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November 2005
Food Supplements Taken by Dr. Myers
We take our medications and we take our food supplements―the medications
because our doctor tells us so, and the food supplements because, because……
There are many reasons why we take food supplements and it might be nice to have
another reason to take a particular supplement: Dr. Myers takes it too!
In the following text, from Prostate Forum, volume 9, issue 3 (September 2005),
Dr. Myers explains his methodology.
“Over the past few years, I have been asked repeatedly what
supplements I take and why. In order for you to understand my approach, you need
to know that I regard these supplements as drugs and use much the same methods
to evaluate them as I would a drug.
In medicine, there is a broad consensus as to what constitutes
proof that a drug is a useful treatment of a disease. The most powerful evidence
is a clinical trial in which patients are randomly assigned to the drug or
placebo. Alternatively, the randomization could be between a new drug and an old
drug. These are sometimes called Phase III clinical trials. The best randomized
controlled trials include large numbers of patients followed for years. Large
numbers are needed to ensure that the differences seen are not due to chance,
but indeed reflect a solid reproducible difference.
Duration of a study is important because, with prostate cancer, we
want to make sure that the benefit is durable. In prostate cancer treatment, we
do not have nearly enough randomized controlled trials and we often have to make
due with studies that are less convincing. For example, we have many trials
where a group of prostate cancer patients are carefully characterized and
treated in a consistent fashion and the results compared with what might have
been expected from historical experience with similar patients. These are called
Phase II clinical trials. Much of the information we have today on the impact of
radical prostatectomy arises from clinical studies like this.
The obvious weakness of this design is that the patients on the new
treatment might have done better for some reason unrelated to the new treatment
itself. For example, since the arrival of PSA-based screening there is a trend
toward diagnosing patients with smaller cancers more likely to be confined to
the prostate gland. It is natural for these patients to live longer after the
diagnosis of cancer than they did in the early 1980s, even if treatment had not
improved at all.
Similarly, improvement in anesthesiology and postoperative care
might reduce complications of surgery, yet the improvement might accidentally be
assigned to improved surgical techniques. Even further down the ladder of
quality would be the “clinical experience” of well-known physicians. In
medicine, there is very convincing evidence that “clinical experience” is a
remarkably poor guide to selecting treatments!
There is yet another source of medical information and this comes
from analyzing the frequency with which various human populations are diagnosed
with and die of prostate cancer. This is the field of epidemiology. The goal of
epidemiology is to look for associations between various factors, such as diet
or screening, and the risk of being diagnosed or dying of prostate cancer.
A good example of this is the frequently quoted fact that deaths
from prostate cancer are lower in Japan than in the United States. Of course,
Japan and the United States differ in many ways. While diet is different, so is
the racial composition of these two populations and thus their genetics.
Additionally, the details of medical care and even the willingness to diagnose
prostate cancer, a disease involving a male sex organ, may also differ markedly.
The best epidemiologists use very sophisticated statistical
techniques to identify and control for such variables. Despite these efforts,
few medical experts regard epidemiology studies as proof of anything. I think
their major value is to identify issues that can then be addressed more
definitively in well-designed randomized controlled trials.
The final source of information would be studies that emerge from
the laboratory. In my experience, this is the place where patients and some
physicians make their biggest mistakes. Time and again, I will see a patient
take a supplement because some study of prostate cancer cells in the laboratory
suggested a possible therapeutic benefit. Overall, very few laboratory findings
prove to be true when subjected to clinical trials. My best guess is that it may
well be only one out of ten or twenty promising laboratory findings prove to be
useful in the clinic. In fact, I am probably being overly optimistic. However,
the problem does not stop there.
Time and again, I have seen patients take a supplement at doses ten
or 20 times the highest known safe dose. Time and again, I have seen patients
damage themselves in this way. What do I look for? First, I would prefer to see
at least one randomized controlled trial that demonstrates a supplement to be
safe and effective.
There are some exceptions. If a supplement has other well accepted
health benefits and known record of safety, I will accept a well done Phase II
clinical trial. As you will see, there is one situation where I have based my
decision on well-accepted general health benefits and one population-based
study.
With all of these rules, my list of supplements is quite short and is
shown in Table 1. For your interest, Table 2 lists some of the more popular
supplements I do not take because I think there is not enough information to
justify their use.”
Table 1.
Recommended Supplements
Lycopene 10 mg with each meal
Selenium 200 mcgs a day
Vitamin E 200 IU a day
Fish Oil 4,000 mg a day
Soy isoflavones 200 mg a day
Vitamin D3 (or cholecalciferol) 4,000 IU a day |
Table 2.
Supplements I DON’T Recommend
Curcumin
Milk Thistle
Resveratrol or grape seed extract *
Zyflamed
CoenzymeQ10
Ambertose
* I do recommend resveratrol as wine or grape juice
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First Clinical Trial of Dark
Chocolate
Dr. Myers emphasizes that heart disease in
prostate cancer patients kills about as many men as prostate cancer. We should
know something about food supplements for both diseases.
Our favorite food for a healthy heart is dark chocolate, preferably
from Holland. But as the
Lancet writes (2005 Aug 20-26;366(9486):608): ” ..<dark chocolate> needs
to be .. tested in trials before any clear-cut health benefit can be ascribed
to them”. Indeed, trials are needed.
Dr. Myers and the Lancet both think so, but the Lancet editorial
was apparently written without the knowledge of an article written two months
earlier:
Am J Hypertens. 2005 Jun;18(6):785-91. Effect of dark chocolate on
arterial function in healthy individuals, by Vlachopoulos C et al.
That article presented the results of the very first clinical trial
of chocolate! The trial followed a “randomized, single-blind, sham
procedure-controlled, cross-over protocol”, — 27 volunteers ate daily 100 g of
dark chocolate (74% cocoa, Noir Intense, Nestlé, Vevey, Switzerland).
Those chocolate eaters showed “a significant increase in resting
and hyperemic brachial artery diameter..; the FMD increased significantly at
60 min ..and the AIx was significantly decreased..” The authors conclude that
“the consumption of dark chocolate acutely decreases wave reflections, that it
does not affect aortic stiffness, and that it may exert a beneficial effect on
endothelial function in healthy adults.”
We have no idea what this all means but that is not important: it
suffices to know that dark chocolate has been tested in a clinical trial. And
it tastes good.
Happy Holidays!
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October 2005
Will Rogers, Garrison Keillor,and Prostate
Cancer
How do Will Rogers and Garrison
Keillor relate to prostate cancer? Will died in an airplane crash in 1935, and
whether Garrison has prostate cancer—we don’t know. But both their names
appear in an editorial in the September 7 issue of the Journal of the National
Cancer Institute entitled “Stage Migration and Grade Inflation in Prostate
Cancer: Will Rogers Meets Garrison Keillor” by Ian M. Thompson et al. Dr.
Thompson is a urologist in San Antonio (TX)
Will Rogers (1879-1935) was born in Indian Territory in
what would later become the state of Oklahoma. Both his parents were
Cherokees, and Will used to quip that, "My ancestors didn't come over on the
Mayflower, they were here to greet the boat!" He grew up as a cowboy, and had
his first vaudeville booking in New York City in 1905 and his first movie
picture in 1918.
In 1922 he began a weekly syndicated column which
eventually reached a large readership through some 350 newspapers. From 1925
to 1928, Rogers traveled the length and breadth of the United States in a
"lecture tour". During this time he became the first civilian to fly from
coast to coast with pilots flying the mail in early air mail flights. His wit
was often caustic: as he explained, "There's no trick to being a humorist when
you have the whole government working for you."
Will Rogers is well-known in the medical community because he once said: "When
the Okies left Oklahoma and moved to California, they raised the average
intelligence level in both states". This is the ‘Will Rogers Phenomenon’:
moving one element from one set to another set raises the average values of
both sets.
Consider, for a numerical example, these two sets:
2,3,4 and 5,6,7. The averages are 3 and 6, respectively. Move the 5 to the
other set, and the new sets will be 2,3,4,5 and 6,7, with averages of 3.5 and
6.5, respectively. The new averages are both more than the old averages.
An example of the Will Rogers Phenomenon in prostate
cancer is the improved detection of illness (PSA!) that leads to the movement
of men from the set of healthy people to the set of unhealthy people. Removing
these men from the set of healthy people increases the average lifespan of the
healthy group but as the migrated men are healthier than those already in the
unhealthy set, adding them raises the average lifespan of that group as well.
This example of the Will Rogers Phenomenon is the
effect of 'stage migration', the discovery of illness by improved
diagnostic methods. Survival rates rise in each group, but this can happen
without any changes in individual outcomes. An increased 5-year survival rate
is not necessarily a proof of progress against prostate cancer! Patients
appear to have an extension of their survival after cancer diagnosis when they
have in fact experienced no prolongation of their lives.
Grade inflation is when students receive higher grades
now than a few years ago. Do students get smarter, or do teachers give higher
scores? A good question and we can ask a similar question in prostate cancer.
Gleason scores have become higher over the past 20 years: do patients have a
more aggressive cancer, or do pathologists give higher scores?
This question has been addressed in an
article by Dr. Peter Albertsen et al., also in the September 7 issue of
the Journal of the National Cancer Institute. Histology slides of the biopsy
cores of 1858 men in Connecticut were reread by a pathologist blinded to the
original scores; the mean score increased from 5.95 to 6.8. During the 12-year
follow-up period 358 men died.
Grade inflation of the Gleason score appears thus a
reality, and as a result the clinical outcomes improved: patients with a
Gleason score of 6 now do better than they would have done 12 years ago.
Why this grade inflation? A premier pathologist, Dr. JI
Epstein, wrote an
editorial in 2000 with this title: “Gleason score 2-4 adenocarcinoma of
the prostate on needle biopsy: a diagnosis that should not be made.”
Another pathologist, Dr. C Pan,
suggested that the Gleason score should represent small quantities of
high-grade cancer, not the two dominant grades.
Whatever the explanation of the grade inflation, most
prostate cancer patients in the Connecticut contingent did ‘better’ with their
new, contemporary Gleason score than they did with their old score. Less
chance to die of prostate cancer but the total number of deaths (358) did not
change!

after Fig. 2 in
Albertsen PC. et al.: ‘Prostate cancer and the Will Rogers phenomenon.’
J Natl Cancer Inst. 2005 Sep 7; 97(17):1248-53.
The lines in the graphs are the survival curves for
patients whose tumors were assigned Gleason scores 6, 7 or 8 in the original
reading (dashed line O) or the contemporary reading (solid line C). The
numbers in each panel represent numbers of patients and numbers of deaths [in
square brackets].
Only deaths due to prostate cancer are listed.
The diagnosis of higher-grade
prostate cancer does not necessarily improve survival, and neither does the
diagnosis of additional cancers:
“If all men were screened using the current threshold of
4.0 ng/mL, 1.5 million American men aged 40 to 69 years would be labeled
abnormal. Lowering the PSA threshold to 2.5 ng/mL would more than double this
number, such that approximately 1.8 million additional men aged 40 to 69 years
would be labeled abnormal and face negative consequences of the test result
(i.e., biopsy or a cycle of repeated testing and anxiety as long as the
uncertainty about whether or not they have prostate cancer persists). If all
1.8 million men had a biopsy, about 1.35 million men would undergo the
procedure unnecessarily (i.e., their PSA test results would be considered
false positives). The remaining men, approximately 450,000, would be diagnosed
with prostate cancer. Whether the lower PSA threshold would have any benefit
on morbidity or mortality is not known, but its burden is clear. If all of
these men underwent radical prostatectomy, approximately 180,000 men would be
expected to be made impotent, approximately 40,000 men would be expected to
have at least moderate incontinence, and approximately 1000 men would be
expected to die from the procedure alone. The problem is that although it is
easy to diagnose more prostate cancer, it is not easy to know who has
clinically important disease.”
(from
HG Welch et al.: Prostate-specific antigen levels in the United States:
implications of various definitions for abnormal. J Natl Cancer Inst. 2005 Aug
3;97(15):1132-7).
Being aware of these issues makes it
easy to understand why Ian M. Thompson finished his editorial with a reference
to Garrison Keillor who mentions Lake Wobegon as a place “where all the women
are strong, the men are good looking and the children are above average”. Dr.
Thompson writes: “our current assessment <of prostate cancer> might be: “
..where all the biopsies are necessary and all cancers require treatment, as
all have Gleason scores above 5”.
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September 2005
Prescription Drugs from Canada
One of our members asked us about pharmacies in Canada. Such a question can be
expected from a long-time member of PCNG. Yes, we have long-time and short-time
members.
Short-time members are typically newly diagnosed, and in the process of
selecting one of he possible therapies that would ‘cure’ their prostate cancer.
Watchful Waiting or Active Surveillance don’t promise a cure – they promise
control, or an extension of the decision making time.
After an apparently successful treatment prostate cancer fades into the
background and the patient does not come to our meetings anymore. We are happy
for him, and don’t expect anything else.
Unfortunately, some patients are not that lucky. If you were one of Dr. Walsh’s
patients (he is now retired, but was generally considered as the top prostate
cancer surgeon in the USA), your chance that the prostate cancer would come back
15 years after the operation would be 31% if you were younger than 50 years when
operated, and 42% if you were older than 70 years (Urology, 2003 Jul;62(1):86-91
(Khan et al.).
Many patients with recurring prostate cancer end up on hormonal therapy, and
nowadays Casodex is one of the more popular hormonal medications. Some patients
take one capsule per day; others take three capsules per day. One capsule costs
a little less than $14 at Costco (the least expensive pharmacy in the USA) and a
little more than $7 in Canada, for a potential savings of about $600 per month!
Many of our long-term members are taking hormonal medicines, and some of them
are fortunate enough to have insurance that covers all or almost all of these
expensive products. Others are not that fortunate and they may be interested in
how to obtain drugs from Canada.
Excellent information can be found in an article from the October 2005 issue of
Consumer Reports, and the following is taken from this article:
Prescription Drugs:The Facts about Canada.
“Even though the practice is illegal, Americans in droves have been importing
prescription drugs from Canada. Last year, an estimated 2 million U.S. citizens
spent $800 million on medicines purchased from Canadian pharmacies by fax,
phone, or Web site. That's 33 percent more than in 2003. ..
What's happening is controversial. The U.S. Food and Drug Administration stands
foursquare against imports, arguing that it cannot ensure they are safe. Many
Americans, however, believe that buying from Canada, a familiar next-door
neighbor, is no more dangerous than picking up a prescription at a local
drugstore. ..
Here's the reality of the government's arguments against buying from Canada:
Canadian drugs are not as safe as U.S. drugs. False. The FDA maintains that
“many drugs obtained from foreign sources that purport and appear to be the same
as U.S.-approved prescription drugs, are, in fact, of unknown quality.”
Furthermore, FDA officials have expressed the concern that news of product
recalls issued in Canada may not reach U.S. consumers.
But Canada's manufacturing and regulatory system is comparable to that of the
U.S., according to an October 2003 study by the state of Illinois' Office of
Special Advocate for Prescription Drugs. FDA critics counter, moreover, that the
agency cannot entirely ensure the safety of drugs manufactured in the U.S.
The Illinois study also concluded that Canada's pricing and distribution system
is less likely to foster the drug counterfeiting that concerns the FDA. Drugs in
the U.S. typically move through multiple vendors (manufacturers, wholesalers,
repackagers, retailers, second repackagers, etc.) before reaching the patient.
In Canada, medications are dispensed mainly in typical dosages and shipped in
sealed packages directly from manufacturer to pharmacy. In a June 2004 report,
the U.S. Government Accountability Office said that all of the prescription
drugs it ordered from Canadian Internet pharmacies contained the proper chemical
compositions, were shipped in accordance with special handling requirements, and
arrived undamaged…
Canadian drugs are not always cheaper. True. To see how much consumers can
expect to save by buying from Canadian pharmacies, we asked
PharmacyChecker.com,
a group that evaluates online pharmacies, to compare drug prices from its
highest-rated Canadian and U.S. Web sites. When we compared the lowest prices of
five well-known brand-name drugs from both Canadian and U.S. sources, the
Canadian pharmacies saved consumers between $72 and $226 per prescription
(including shipping charges). Such medications are cheaper in Canada in large
part because its federal Patented Medicine Prices Review Board has the authority
to limit prices that it deems to be excessive.
But in a similar comparison, a U.S. site had the best prices for the five most
prescribed generic drugs. Because generic drugs cost less, the savings are less:
from $7 to $31 per prescription. “The larger, more competitive generic market in
the U.S. helps keep prices down,” says Thomas McGinnis, the FDA's director of
pharmacy affairs.
You could get arrested. True but unlikely. Ordering prescriptions from Canadian
Web sites violates the Federal Food, Drug, and Cosmetic Act, which generally
makes it a crime for anyone other than the original manufacturer to import a
drug, even if it was first manufactured in the U.S.
So far, however, the FDA has focused its enforcement efforts only on those who
“commercialize” drug importation. One example: RxDepot, an Oklahoma prescription
drug service that was forced to shut down in 2003. But there are currently no
plans to charge consumers. McGinnis says, “We are allowed to exercise
enforcement discretion, and it's not our policy to go after individuals.”
Many Internet sites are not legitimate pharmacies. True but avoidable. CIPA
warns that many Web sites selling medications have been created to lure U.S.
consumers seeking cheaper prices. Patients who order from such sites run the
risk of receiving medications that are subpotent, improperly handled, or
counterfeit. Furthermore, the FDA says some Web sites may not tell you that a
drug they sell you is obtained from an overseas supplier. “You may be sent a
drug that originated in Australia, Great Britain, or Pakistan,” says McGinnis.
“We don't know anything about the strength, quality, or purity of those
medications.”
Patients, however, can avoid such problems by ordering only from pharmacies that
have been thoroughly scrutinized by CIPA. To display a CIPA seal on its Web site
an online pharmacy must have a valid Canadian license, submit to a quarterly
on-site inspection, and keep personal information confidential in compliance
with PIPEDA, the Canadian privacy act similar to The Health Insurance
Portability and Accountability Act, or HIPAA, in the U.S.
The online pharmacy must also require you to submit a valid prescription and
medical history and to check for possible drug interactions. And CIPA members
must let you know in advance if they are supplying you with a medication from
another country so you have the right to refuse. You can find a list of the 37
Canadian pharmacies with CIPA seals at
www.ciparx.ca/cipa_pharmacies.html.
Another source of information about online pharmacies is
PharmacyChecker.com (P4
in “LINKS” on PCNG’s web page) whose review process is similar to CIPA's. ..
WHAT TO DO
The flow of prescription drugs from Canada may not last forever. Ujjal Dosanjh,
the Canadian Health Minister, proposed on June 29 that a new supply network be
established to keep tabs on the nation's drugs and that bulk shipments to the
U.S. be stopped if the system detects a shortage. In addition, he proposed a
requirement that “an established patient-practitioner relationship” should exist
before a physician may prescribe any medications. Whether or not this means that
U.S. citizens will have to meet face-to-face with a Canadian doctor before they
can purchase drugs will not be determined until sometime this fall, when the
minister plans to introduce legislation.
But whatever happens, you should take the following steps before ordering:
• Check Consumer Reports Best Buy Drugs (www.CRBestBuyDrugs.org) to learn about
drug options, including generics and over-the-counter drugs, that could save you
money.
• Ask your doctor to prescribe generic drugs, which cost much less than
brand-name drugs. Remember to buy them in the U.S., where they are generally
cheaper than in Canada.
• If you need a high-priced, brand-name drug, check with the Partnership for
Prescription Assistance (www.pparx.com; 888-477-2669), which lets you find out
in one step whether you are eligible for any of the 275 programs that offer cost
savings to consumers.
• If ordering from Canada is the only way you can afford the medication you
need, go to PharmacyChecker.com for recommendations of approved outlets, and
look for the CIPA seal to protect yourself.”
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August 2005Your PSA is 0.8;
my PSA is 1.1, and his PSA
is 2.3 - what does that mean?
We have been asking friends and colleagues whether they know their PSA.
'Oh yes' many answer, 'My doctor says that it is OK, and he knows it'. 'But do
you know it?' is our response. 'Uh, no'. That is typical, unfortunately.
We have been bugging Rick about his PSA and he finally
realized that in order to get rid of our questioning he had to remember the
number. It was 1.1. What does it mean that Rick has a PSA of 1.1?
Here, in the USA any value below 4.0 is generally considered
normal, and 1.1 is thus a normal value. But so is 0.8, or 2.3. All normal
values, but they are not the same.
The significance of the differences in normal values can be
deduced from a recent study: 4-YEAR PROSTATE SPECIFIC ANTIGEN PROGRESSION AND
DIAGNOSIS OF PROSTATE CANCER IN THE EUROPEAN RANDOMIZED STUDY OF SCREENING FOR
PROSTATE CANCER, SECTION ROTTERDAM, by Schroder, FH et al., and published in The
Journal of Urology, Volume 174(2), August 2005, pp 489-494.
In Rotterdam (The Netherlands) 42,376 men were randomized
into two groups: 21,210 in the screening group, and 21,166 in the control group.
19,970 men were actually screened. In 9,779 of these men a biopsy was
recommended if the PSA was 4.0 ng/ml or greater, and/or an abnormal rectal
examination and/or a suspicious transrectal ultrasound were found. As of May
1997 the PSA cutoff for recommending a biopsy was decreased to 3.0 ng/ml, and
the use of rectal examination and transrectal ultrasound was discontinued.
A total of 10,191 men were found to have a PSA greater than
3.0, and 541 of these men (5.3%) had prostate cancer.
The group of men with a PSA less than 3.0 consisted originally of 21,210
minus10,191, or 11,019 men, but for various reasons only 5,771 men were followed
into the second round of screening, four year later. There were 662 men (11.5%
of 5,771) with a PSA greater than 3.0 in this second round; 578 of those men
were biopsied, and 152 men had prostate cancer.
This makes one pause when the doctor says that everything is
fine because the PSA is normal, i.e., below 4.0 ng/ml. We have summarized, in
the February 2005 issue of this newsletter, an article that maintains that a PSA
of 0-4.0 ng/ml should not be considered as a range that excludes prostate
cancer.
So what is Rick's chance of being diagnosed with prostate
cancer in the next few years? His PSA is not the lowest possible. Of the 2,622
men with a PSA less than 1.0 in the first round only 23 men (less than 1
percent) had a PSA more than 3.0 in the second round. Four had prostate cancer.
There were 2,268 men with a PSA between 1.0 and 1.9 in the
first round ─ 211 men (almost 10 percent) had a PSA greater than 3.0, and 43 men
had prostate cancer in the second round of screening. There were only 881 men
with a PSA between 2.0 and 2.9 in the first round, but 428 (almost 50%) had a
PSA greater than 3.0 in the second round, and 105 had prostate cancer.
Look at these numbers, and one sees that Rick is fortunate of
having a PSA of only 1.1 ng/ml. He is just outside the group with the lowest PSA,
and his chances of being diagnosed with prostate cancer are slim indeed. Not as
slim as those in the group with the lowest PSAs, but still much better than
those with a PSA between 2.0 and 3.0.
So what is the morale of this story? Know your PSA, keep
track of the changes over time, in particular when your PSA is between 2.0 and
3.0. ‘Serial PSAs’ are the name of the game, and ‘PSA progression’ is critical.
It should be small.
Good luck!
Acne as a Teenager? Good for the Heart, Bad for the Prostate.
Am J Epidemiol. 2005 Jun 15;161(12):1094-101. Acne in adolescence and
cause-specific mortality: lower coronary heart disease but higher prostate
cancer mortality: the Glasgow Alumni Cohort Study. Galobardes B et al.
...This study investigated the association between history of acne in young
adulthood, a marker of hormone activity, and cause-specific mortality in the
Glasgow Alumni Cohort Study. Male students who attended Glasgow University
between 1948 and 1968 and participated in voluntary health checks reported
history of acne (n = 11,232). ... The two groups did not differ in other
adolescent (height, body mass index, blood pressure, and number of siblings) or
in most adult risk factors. Students who reported a history of acne had a lower
risk of all-cause (hazard ratio = 0.89, 95% confidence interval (CI): 0.76,
1.04) and coronary heart disease (hazard ratio = 0.67, 95% CI: 0.48, 0.94)
mortality but had some evidence of a higher risk of prostate cancer mortality
(hazard ratio = 1.67, 95% CI: 0.79, 3.55). This study shows that androgen
activity during adolescence may protect against coronary heart disease but
confer a higher risk of prostate cancer mortality.
Shocking Percentages!
J Clin Oncol. 2005 Jul 25,Riding the Crest of the Teachable Moment: Promoting
Long-Term Health After the Diagnosis of Cancer. Demark-Wahnefried W et al.
Cancer survivors are at increased risk for several comorbid conditions, and many
seek lifestyle change to reduce dysfunction and improve long-term health. … that
only 25% to 42% of survivors consume adequate amounts of fruits and vegetables,
and approximately 70% of breast and prostate cancer survivors are overweight or
obese. ...
Statins Reduce Prostate Cancer Risk?
Am J Epidemiol. 2005 Aug 15;162(4):318-25. Statins and prostate cancer risk:
a case-control study. Shannon J et al. …Thirty-six percent of 100 prostate
cancer patients and 49 percent of controls had a record of any statin use.
Following adjustment for other potential risk factors, statin use was associated
with a significant reduction in prostate cancer risk (odds ratio = 0.38, 95%
confidence interval: 0.21, 0.69). Furthermore, in analyses stratified by Gleason
score, the inverse association with statin use was maintained only among men
with Gleason scores of >/=7 (odds ratio = 0.24, 95% confidence interval: 0.11,
0.53). The results of this case-control study suggest that statins may reduce
the risk of total prostate cancer and, specifically, more aggressive prostate
cancer.
Small Pilot Study Shows that Pilots Stabilized their PSA with Statins
(Dr. Myers prescribes statins to most of his patients)
J Urol. 2005 Jun;173(6):1923-5. The effect of statins on serum prostate
specific antigen levels in a cohort of airline pilots: a preliminary report.
Cyrus-David MS et al. PURPOSE: Reports of the effect of treatment with
statins on prostate cancer risk are inconsistent. We performed a pilot study to
assess the effect of statin treatment on a surrogate marker for prostate cancer
risk, that is serum prostate specific antigen (PSA), in a cohort of airline
pilots from 1992 to 2001. ... The treatment group was composed of 15 men with
hypercholesterolemia [cholesterol was high] who received statins and the
comparison group of 85 with normal serum lipid levels [cholesterol was normal]
during the review period. ...Serum PSA was significantly higher in the treatment
group at baseline relative to the comparison group (p = 0.05). Interestingly
there was no significant difference between the groups on subsequent followup.
There was a 41.6% decrease in mean serum PSA in the treated group by visit 4.
Simultaneously mean serum PSA increased by 38% in the untreated group.
CONCLUSIONS: Our results suggest that treatment with stay lower serum PSA with
time. These results must be confirmed in a larger study population ...
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July 2005
What is New in Prostate Cancer Research and
Treatment?
(Comments on abstracts presented at the Annual Meeting of
the AUA in San Antonio, TX)
Thousands of urologists, other physicians, and scientists
convened in San Antonio (TX) to look at posters, listen to talks, and watch
videos at the Annual Meeting of the American Urological Association, May 2005.
We were not there, but have nevertheless an idea what was going
on by reading the abstracts. Nowadays we read them “on line”. Click on
http://www.aua2005.org/am05/content/abstracts/ and enter “prostate cancer” ─
there are 474 presentations on prostate cancer! Many are presented as text files
only, but some can be seen as they were presented in the poster sessions, as PDF
files. Click on
http://www.posters2view.com/aua/search.php to find the posters. The
presentations vary in significance. They are screened, but not as carefully as
papers in refereed journals. There are progress reports of on-going studies that
have already been published or will be published shortly, and there are
presentations with brand-new information. The full text of the presentations
referred to in this newsletter can be seen in
http://pcngcincinnati.org/.
Patients diagnosed with prostate cancer need time to educate
themselves about the disease, to schedule treatment, and to receive insurance
OKs. How much time between diagnosis and treatment is permissible?
This question is answered in the # 1002 poster: “The
Impact Of Time From Biopsy To Surgery On Biochemical Recurrence Following
Radical Prostatectomy For
Clinically Localized Prostate Cancer”. Stephen Boorjian, Fernando J. Bianco Jr.,
Peter T. Scardino, and James A. Eastham, NYC, NY. The data from these authors
suggest that a delay from prostate biopsy to RP of up to 1 year is permissible,
even for patients classified as high risk of recurrence. “These findings may be
used to allay patient anxiety.”
We looked for new information on Intermittent Androgen
Deprivation. There was one presentation, #813: “Phase III
study Intermittent Monotherapy versus Continuous Combined Androgen Deprivation,
an International Cooperative Study”.
Fernando EC Calais da Silva, Lisbon, Portugal; Frederico Gonçalves, Bratislava,
Slovakia; Americo Santos, Portugal; Jan Kliment, , Slovakia; Spyros Pastides,
Greece; Marques Queimadelos, Spain; Cris Robertson, Spain were the authors. An
international study indeed! Most other presentations and articles on
Intermittent Hormonal Therapy (IHT) have also been authored outside the USA, in
Canada, Belgium, and Germany. The results are all about the same: IHT is as good
as or better than Continuous Hormonal Therapy and the side effects are less.
Your Insurance Determines your Treatment: #192 “Prostate Cancer Treatment and
Insurance Status: Data from CaPSURE”. Natalia Sadetsky, Eric P. Elkin, David M.
Latini*, San Francisco, CA; Janeen DuChane, Lake Forest, IL; Peter R. Carroll,
Lake Forest, IL. Insurance status was summarized by 6 categories: Medicare only,
Medicare plus supplement, HMO, PPO, fee for service (FFS), and Veteran’s
Administration (VA). 4491 men met the inclusion criteria. There was a strong
association of initial treatment and insurance. Compared to Medicare patients,
men in the VA system were more likely to receive BT (brachytherapy) than RP
(radical prostatectomy), while patients with PPO insurance were less likely to
receive BT. Men with PPO and HMO insurance were less likely to receive HT
(hormonal therapy) when compared to patients insured by Medicare, and VA
patients received hormonal therapy more often than Medicare patients.
African Americans are at Increased Risk for Prostate Specific Mortality but
Adjustment for Insurance and Income Diminishes the Effect of Race on Survival!
#465 “Impact of Socio-economic Factors on Long Term Mortality in Men Diagnosed
with Clinically Localized Prostate Cancer.” Ash Tewari*, Lee Richstone, Assaad
El-Hakim, New York City, NY; George Divine, Mani Menon, Detroit, MI. identified
2,046 men with local or regional prostate cancer: 1243 Caucasian and 803
African-American (AA) men. Patients received radical prostatectomy (RRP, 37%)
radiation therapy (RT, 34%), or watchful waiting (29%). African Americans had
higher baseline PSA (12.8 vs. 10.2, respectively). There were no significant
differences in tumor stage or grade. Caucasian men were more likely to receive
RRP compared with AAs (43% vs. 23%), whereas AAs were more likely to be treated
with RT (41 % vs. 28%). Caucasians had higher incomes; 55% earned >$40,000
compared to 12% of AAs. African Americans were more likely to have HMO coverage
versus Caucasians (42% vs. 35%). African Americans had decreased cancer specific
survival (CSS). Multivariable models demonstrated that adjusting for clinical
factors or type of treatment had minimal impact on the association of race with
CCS. However, when adjusting for HMO insurance and income, the association of
race with poor outcome greatly diminished.
When should patients on watchful waiting stop waiting? #1003 “Progression of
Biopsy Grade in Men with Prostate Cancer Managed by Watchful Waiting”. Jonathan
R Osborn,, Gerald W Chodak, et al., Chicago, IL assessed if changes in
pathologic tumor grade on repeat prostate biopsies could help identify patients
that should undergo definitive therapy following watchful waiting. Men with
clinically localized CaP treated by watchful waiting were advised to undergo
repeat biopsies every 1-2 years after initial diagnosis.
Patients underwent up to 7 repeat biopsies: 35% percent (14/40) of the patients
showed an increase in biopsy grade to Gleason 7 or greater. Three progressed to
Gleason 7 within 2 years, 4 progressed between 2 and 4 years, and 7 progressed
at greater than 4 years from initial diagnosis. Among patients showing
progression, 4 continued with watchful waiting, 4 chose androgen ablation, 1 had
a radical prostatectomy, 1 had brachytherapy, 3 opted for a combination of
therapies and 1 has not yet decided. Of 12 men with more than 1 year of PSA
results prior to the Gleason 7 biopsy, 7 (58%) had a PSA rise of >2.0 ng/mL
within a year of progression. In contrast, 14/26 (54 %) had a rise of more than
2 ng in the year prior to a biopsy when there was no change in the biopsy grade.
Seven patients (26%) underwent definitive local or systemic therapies without
histological progression beyond Gleason 6. Median length of follow up (to
curative treatment, or most recent PSA measurement) was 61.0 months (range
6-153). Conclusions: “In men managed without local or systemic treatment for CaP,
the risk of progressing to a Gleason score of 7 or greater on repeat biopsy is
approximately 35% of those followed for more than 4 years. A rise of >2 ng/ml in
the year prior to the biopsy failed to identify the patients with an increase to
Gleason 7. Serial biopsies in patients undergoing watchful waiting may offer a
good option for identifying men with more aggressive cancers who will need
definitive therapy but changes in PSA was not a useful parameter.”
Viagra is important for RP patients. #270 “Five-year Potency Status after
Radical Prostatectomy…”Kalyana C Nandipati*, Rupesh Raina, Ashok Agarwal, Craig
D Zippe, Cleveland, OH. ”The reported potency rates after radical prostatectomy
(RP) vary from 11-86% and are often reported 12-24 months after surgery. 5-year
potency status after RP has not been reported in the literature… At 5 years,
sexual activity following radical prostatectomy decreases 50%, most of them due
to loss of interest and associated medical co-morbidities. At 5 years 38%
(43/113) were sexually inactive. The vast majority (77.8%) of radical
prostatectomy patients are Viagra/erectaid dependent, with only 22.2 % having
natural erections sufficient for intercourse.”
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June 2005
Your PSA is High – What Next
Your PSA (produced by the prostate and measured through a blood test) is 4.5,
and your doctor says that this is not normal, it is too high. Normal is a PSA of
less than 4.0, he says, and that is what you had a year ago. You worry because
your great-uncle died of prostate cancer ― does this anomalous PSA reading mean
that you have cancer? No!! Although it could be possible, it is more likely that
you don’t have prostate cancer that needs to be treated. But it IS likely that a
minor change in your PSA may lead to several visits to doctors, and you better
be somewhat knowledgeable about the prostate and its high PSA. The following
pages may help you to acquire the knowledge that gives self-confidence and to
prepare you to make better decisions. That knowledge will also make it easier to
communicate with your doctor
prelude
1. An unexpected high PSA should not lead automatically to a biopsy of the
prostate. A biopsy (the taking of tissue samples, with hollow needles) can
demonstrate the presence of cancer, but there is no need to undergo a transrectal ultrasound (TRUS) guided biopsy if cancer can be ruled out
beforehand. Biopsies are invasive, sometimes painful, and costly. A positive
rectal examination (DRE) should be followed by a biopsy, but if the DRE is
negative and the PSA elevated, a blood test that determines the free PSA
percentage can be useful. A free PSA percentage over 25% is associated with a
low risk of prostate cancer, whereas a free PSA percentage under 15% is
associated with a higher risk of prostate cancer1. (The
1 refers to a reference
at the end of this document, and clicking on the
1 in
pcngcincinnati.org leads
to an abstract of that article).
2. A high PSA can point towards prostatitis (inflammation of the prostate), an
entirely benign disease that does not increase a man’s chance to develop
prostate cancer. Acute and chronic bacterial prostatitis is caused by bacterial
infections, and nonbacterial prostatitis is an inflammation of unknown cause.
Asymptomatic prostatitis has no urinary problems but the PSA is elevated
nevertheless. To exclude bacterial prostatitis as the cause of your high PSA the
doctor will proscribe 4 to 6 weeks of Cipro or a similar antibiotic. Some of the
nonbacterial prostatitis responds to NSAIDs such as ibuprofen (Motrin, Advil,
etc.) or naproxen (Aleve etc.). The PSA is measured again after the Cipro
therapy― you probably had bacterial prostatitis if there is significant lowering
of the PSA! Prostatitis is one of the reasons that cancer is not found in about
70% of men with a PSA of 4-10 ng/ml.
3. You may also have BPH: Benign Prostate Hyperplasia. BPH is common, occurring
in 70% of men 60-70 years old. The prostate grows over time but that growth is
not the result of cancer. It is a ‘benign’ growth, but that word appears a
misnomer if your BPH made it difficult to urinate or created urinary problems
such as urinary retention. Your doctor may feel the size of your prostate with
his finger (DRE: Digital Rectal Examination – digit means finger) or refer you
to an urologist who can measure the prostate’s volume more precisely with
ultrasound. As the amount of PSA produced by the prostate is about the same per
cubic centimeter or milliliter, a large prostate will produce more PSA than a
small one. This is the reason that a biopsy report negative for cancer must
include the volume of the prostate. BPH makes it difficult to urinate because
the urethra gets squeezed by the growing prostate. Increasing the diameter of
the urethra is done with the TURP procedure, but that is only after Hytrin and
other so-called alpha-blockers, or Proscar or Avodart have been unsuccessful.
Alpha-blocker treated patients have been reported to have a higher risk of TURP
compared to patients treated with Proscar or Avodart2.
4. What if the free PSA % is high (25 or more) and your prostate is of normal
size? Don’t panic. Your doctor will most probably ask you to come back in 1 or 2
months for another blood test (remember that a high free PSA % is associated
with a low risk of prostate cancer). A high PSA can have resulted from prostate
massaging by riding a bicycle or from sexual intercourse less than 24 hours
before the blood test. PSAs that go up and down are more indicative of a benign
process than a malignant process such as cancer.
5. A biopsy after a negative DRE but a high PSA >4 but < 10 ng/ml results in a
cancer diagnosis in less than one third of the men. A better indicator for a
biopsy is the uPM3 urine test, predicting cancer, as confirmed by biopsy, with
81% accuracy, compared to 47% accuracy for PSA elevations3. At present (early
2005) only one laboratory can do the test (Bostwick Labs: tel. 800-214.6628);
Medicare and most private health insurance plans will pay the cost.
6. Your doctor will refer you to an urologist as a result of a positive DRE; a
consistent increase in PSA values; a low free PSA percentage, or a positive uPM3
urine test. He (or she) ruled out prostatitis and BPH as cause of the elevated
PSA. The urologist will advise you to have a biopsy of your prostate by
inserting 6 or 10 or even 12 hollow needles in it. The prostate tissue in the
needles (the ‘cores’) will be studied by a pathologist. Ask the urologist to
determine the volume of your prostate! Ask him also for a printout of one of the transrectal ultrasound (TRUS) images he used to determine where to shoot his
needles. Most men think that the biopsy was not painful, but there are
exceptions.
7. The urologist will present the pathologist’s report at your next visit. It is
an important document, and you should ask for a copy. There may be or may not be
adenocarcinoma (the most common form of prostate cancer) or “PIN”. (Don’t worry
about having PIN—"…isolated PIN was never predictive for prostate cancer. PIN
should not be an indication for repeat biopsy"4). The pathologist looks also for
cancer growing near nerve cells, describing this as perineural invasion, or
finds that perineural invasion is absent. Prostate cancer is further defined
with the ‘Gleason Score’ and the amount of cancer in the core, the ‘core
percentage’. The Gleason score (GS) is nowadays written as follows: 7 (3,4), a
number followed by two numbers between parentheses. The sum of the two numbers
is the score. Better is the addition of a percentage: 7 (3, 4-5%). The numbers
indicate the aggressiveness of the cancer: 4 is worse than 3 and 5 (the maximum)
is worse than 4. A cancer with a GS of 7 (4,3) is worse than a 7 (3,4) cancer,
and a 7 (3, 4-40%) is worse than a 7 (3, 4-5%) cancer. The core percentage gives
the percentage of cancerous tissue in the cores – it may range between 5 and
100%. Is it 5% in one of nine cores, or 5% in 4 of six cores? The number of
positive cores is also important.
8. The urologist says that you have cancer: you are in a panic. He (or she) says
that you should do something about it. You very much agree. One of the options,
he says, is a radical prostatectomy (RP). The prostate will be cut out, and you
will be rid of your cancer. The urologist will tell you that RP is considered
the ‘golden standard’ in prostate cancer therapy, but that there are other
treatments and that YOU must make the decision what to do. He (or she) most
likely will discourage "watchful waiting", but may give you a referral to see a
radiation oncologist.
9. You come home, and are still in a panic. This is the moment that you should
begin three activities: getting your papers in order, learning about prostate
cancer, and getting your partner involved (we hope you have one). Those
activities will help you to get through the ordeal.
1. Getting your papers in order does not imply writing your last will and
testament as the chance that you will expire in the next 5 years is very small
indeed. Getting your papers in order entails going to your PCP asking for copies
of all PSA measurements, and combining those with a copy of the pathologist’s
report and any other relevant document. This collection will become your
prostate cancer digest to be shown to other doctors you are going to see. An
additional PSA? Other blood tests? Add these and other measurements to your PC
digest!
2. Learning implies reading books, surfing the Internet and sharing
information with other patients at a support group.
3. Getting your partner
involved: share with your partner your knowledge, your fears, and your hopes.
10. Learning about prostate cancer begins with learning some basic percentages.
It begins with the percentage of men with prostate cancer. Not cancer detected
with a biopsy but cancer detected by autopsies. Amazingly, having prostate
cancer at 65 (the average age that prostate cancer is detected) is normal ―
being without cancer is NOT normal. About 65% of all 65 year old men have cancer
of the prostate according to autopsies! Most of those cancers are not detected
because there was no biopsy, or because the hollow biopsy needles missed the
cancer. Still, the American Cancer Society expects that 232,900 men will be
diagnosed with prostate cancer in 2005. Only 30,350 men are expected to die of
this disease, and the percentage of men with prostate cancer dying of the
disease is thus not that large. Compare these percentages with those having lung
cancer or pancreatic cancer – yes, you are relatively fortunate to have prostate
cancer and not another more lethal cancer. Prostate cancer grows slow-most of
the time.
staging
You will discover that the urologist was not kidding when he said that you must
make up your own mind what to do. Doctors give advice and members of a prostate
cancer support group such as PCNG share their experiences. You will have a great
deal of knowledge in addition to that what you gathered from the Internet and
from reading books. What to do? As always, learn before making a decision.
11. The first question you could ask yourself is: must I be in a hurry? It
depends. Have additional PSAs measured ― it may help to determine your sense of
urgency. A rapidly increasing PSA –e.g., in one month from 4.5 to 4.8 or from
11.0 to 11.5-- is worrisome. Another test that may help you in that respect is
the PAP (prostatic acid phosphatase) test. An anomalous (high) PAP, a high PSA
(>20), a high Gleason score (8 or more), or a rapidly increasing PSA may be
reasons that you want to make up your mind quickly, i.e., in two or three
months. PC generally grows slowly! When all indicators are positive, you may
take more time but keeping track of your PSA is fundamental.
12. Confirmation of your Gleason score may be crucial! You could need a second
opinion from another pathologist’s examination of the biopsy cores, from one of
the experts who look at prostate cancer biopsies exclusively5. Finding a GS of 7
instead of a GS of 6 (or vice versa) may influence your decision making process.
Insurance or Medicare will usually cover a second opinion ($4-500). A second
opinion is recommended for all men diagnosed with prostate cancer and in
particular for those with a GS of 7 or less.
13. The urologist has another tool (his or her finger) that indicates how
serious your cancer is. It is classified as follows: T1: cancer not felt with DRE:
T1a or T1b: cancer in tissue removed by TURP; T1c: cancer in tissue removed
by biopsy needles; T2: cancer felt with DRE, but still confined to the prostate
(T2a/b: one lobe: T2c: two lobes); and T3 and T4: cancer is felt to be outside
the prostate as well. This T+number is known as clinical stage, and it defines
your cancer, together with PSA and Gleason score (GS). You may introduce
yourself at a prostate cancer support group as a T1c, PSA 8, 10% core with
cancer, and a GS of 6. Or as a T2b, PSA 9, 25% core and a GS of 7.
14. If you have a T3 or T4 classification, a high PSA (>10 and if your PSA is
less than 10 but your GS is 8 or more), or have bone pain, expect your urologist
to prescribe a bone scan. Such a scan will see whether the cancer has escaped
the prostate and is in your bones (typically the back bone or the ribs). The
cancer is now metastatic.
CT (‘CAT’) scanning seldom provides any useful diagnostic or staging information
when the PSA is less than 20 ng/ml -it is indicated rarely6. The scans are a few
of the many procedures that may lead to a better staging of the cancer – see “A
Primer on Prostate Cancer” by Stephen Strum and Donna Pogliano for additional
procedures.
therapy
There are three responses considered by men just diagnosed with prostate cancer
(PC): watchful waiting (WW), local therapy (treating the cancer in the prostate)
such as radical prostatectomy (RP) or brachytherapy (‘seeds’), or
hormonal
therapy. Local or hormonal therapy may not be necessary for men with minimal
disease because the chance that they will die of PC is small indeed; those men
may opt for WW. About all men diagnosed with prostate cancer take medications
(either prescribed or OTC: over the counter) that belong to the realm of
alternative or complimentary therapy.
15. Watchful Waiting and Active Surveillance –
“Good risk prostate cancer, defined as patients with a Gleason score of 6 or
less, PSA <10–15, and T1c–T2a, now constitutes 50% of newly diagnosed prostate
cancer. For most of these patients, the disease is indolent and slow growing.
There is substantial evidence that it does not pose a threat during the lifetime
of most patients. The challenge is to identify those patients who are not likely
to experience significant progression while offering radical therapy to those
who are at risk”7.
“Twenty years ago, most men diagnosed with prostate cancer
had advanced disease. Only about 25 percent of men were diagnosed with cancer
that appeared to be confined within the prostate. Today, the story is nearly
reversed: 75 percent of men diagnosed with prostate cancer have clinically
localized disease. Today, some men are found to have minuscule amounts of
cancer—smaller than 0.2 cubic centimeters, about the size of a pinpoint,
captured by sheer chance during a biopsy. For some men, these are cancers that
will never cause harm, and ideally, should never have been diagnosed. Which
leads to a treatment dilemma: If this kind of small-volume cancer is diagnosed,
what should happen? To treat, or not to treat? What should a man do? For some
men, these are cancers that will never cause harm, and ideally, should never
have been diagnosed. Which kind of cancer is it—the “good” kind that seems
content to remain in the prostate and never causes harm, or the kind that will
be less indolent over time, and needs to be nipped in the bud?”8
For a man in his forties or fifties, a very small tumor might be significant,
but in an older man a very small tumor probably isn’t significant because of the
time it takes for that tumor to grow and become dangerous. For men who are in
their sixties or older, watchful waiting (WW) or expectant management (term used
at Hopkins Univ.) or active surveillance (the name indicates more monitoring
than with watchful waiting) may well be a rational approach. Criteria7 for such
a treatment include a Stage 1c cancer (cancer detected because of an elevated PSA), free PSA > 15%, PSA density (=prostate volume divided by the PSA) < 0.15,
Gleason score 6 or lower, cancer in only 1 or 2 cores, and less than 50% in each
core. Watchful waiting is in some respects an unfortunate term: patients can be
actively involved in battling their cancer. Their treatment can consist of
eating less fat; more vegetables, more fruit and fish, and the use of
supplements like vitamin E, lycopene, and selenium.They have their PSA monitored
regularly. This is not just ‘waiting’. This is taking action, and this could be
called aggressive watchful waiting (AWW).
Dr. Ornish conducted a small trial comparing two groups: one just waiting and
the other one with a modified diet and stress reduction exercises9. The men all
had PSA levels of 4 to 10 ng/ml and Gleason scores of less than 6. The
experimental group ate an entirely plant-based low-fat diet that emphasized
unprocessed whole foods. Participants also engaged in moderate aerobic exercise,
stress management, and psychosocial group support. All men had declined
conventional treatment. After one year, mean PSA levels decreased by 3% in the
experimental group but increased by 7% in the control group. Dr. Ornish suggests
that patients make comprehensive changes in diet and lifestyle, regardless of
whether they have decided to have local therapy. Being on AWW does not exclude
local therapy! The change from AWW to local therapy can be induced by a steadily
increasing PSA, on the base of the speed of the increase, not on the absolute
value (a steady increase from 4 to 6 over four years is worse than an increase
from 9 to 11. One needs to determine the PSA doubling time (PSADT). A doubling
time of one year implies that the PSA increased from 3 to 6 (or from 22 to 44)
in one year. In a study10 with 231 patients on watchful waiting the median PSADT
was 7 years (in 7 years, e.g., from PSA 5 to PSA 10). If the PSADT became less
than 3 years the men were advised to have local therapy. Choosing (aggressive)
watchful waiting is thus not necessarily a permanent decision. Whether
postponing final treatment (for those who had watchful waiting followed by local
or hormonal therapy) has an impact on the timing of death due to prostate cancer
is unknown but appears unlikely in most cases.
16. Local Therapies –
Fortunately, relatively few men will have to choose
between the various hormonal therapies. Most men have prostate cancer that
points to a local therapy as the best choice. Those lucky men must still choose,
but it is now between the various local therapies that will remove the cancer.
But they should also consider watchful waiting or aggressive surveillance: the
cancer might grow slowly and the objective will be to die with prostate cancer
and not because of prostate cancer. There are choices to be made, and it is not
obvious which choice is best. What makes it even more difficult is that the
choice is also a reflectance of the personality of the patient, and this
explains why two patients with the same diagnosis might choose two radically
different therapies. And there are the limitations of the various insurance
plans: HMO, PPO or Medicare. What appears to be needed is the answer to a few
simple questions: Can local therapy be delayed for several months or should it
be treated quicker? One study11 found that it doesn’t make a difference. Is a
local therapy ‘better’ than watchful waiting? Is RP ‘better’ than brachytherapy?
Is laparoscopic RP ‘better’ than a normal RP? What is meant with ‘better’? Less
mortality? Less side effects such as impotence or incontinence?
More important than choosing a certain local therapy is the choice of who will
do it: in general, the physician with the most experience will do a better job
than the one with little experience, irrespective of the type of therapy. The
patient should ask “How many (laparoscopic) RPs or how many brachies have you
done in total, and how many this year?” We warn you: doctors don’t like these
questions, partially because you may discover that the top physicians don’t
necessarily live in Cincinnati. They may live in Detroit, Miami, NYC, (robotic
laparoscopic RP), Baltimore, Columbus or Cleveland (RP), and Atlanta, Seattle or
Sarasota (brachytherapy). One might prefer to go to Miami instead of staying in
Cincinnati, but will the insurance pay for that?
17. RP, EBRT, brachytherapy and brachy+EBRT are most commonly chosen as local
therapy of prostate cancer. One gets rid of the cancer! That notion is
attractive, and its appeal should not be underestimated. But local therapy does
not guarantee survival.
For an understanding what is meant with survival, look
at the diagram10
to the left. It is part of a diagram that shows that men diagnosed with a
Gleason score of 6 have a much better chance of survival than those with a
Gleason score of 8, 9 or 10. The mortality of GS 6 men from non-prostate causes
is greater than that from prostate cancer, opposite to the mortality in the GS
8-10 men. The diagrams are based on men who did not have local therapy. They
were on ‘watchful waiting’ (WW). So how would they compare with men who had
their prostate removed? That question is answered in a study12 in which 695 men
(PSA < 50, no T3/T4, no positive bone scan) were randomly assigned to radical
prostatectomy (RP) or watchful waiting. After 10 years the conclusions can be
summarized in the diagram below, showing that there are more deaths from
prostate cancer in men on WW than in men who had RP, but only in those younger
than 65 years. If you are 65 years or older, it made no difference what therapy
you had been assigned to as far as death from prostate cancer was concerned. But
this does not imply that there were no differences between the two groups of
men. Those on watchful waiting would have less impotence and incontinence that
may result from a RP, but they would carry the considerable psychological burden
that their cancer is still in them. Men on WW had also more treatment with
hormonal therapy than men who had a RP: 177 of the 348 men in the watchful
waiting group but only 110 of the 347 men in the RP group. The WW men didn’t
begin hormonal treatment earlier: the mean time to such treatment was 4.5 years
in the RP group and 4.8 years in the WW group.
Local therapy is a ‘no-brainer’ for high-risk patients or those younger than 65
years. The problem for these men is the choice between the various local
therapies and whether hormonal treatment should be added as an adjunctive
therapy (only for those with high-risk prostate cancer). And if hormonal therapy
is to be added, what type of hormonal treatment: Zoladex (big needle)? Lupron
(small needle)? Casodex alone? CHT? ADT3? Learn from other patients how they
experienced the different treatments.
For men older than 65 years with low-risk cancer the choice is between local
therapy and watchful waiting, knowing that it won’t make much of a difference,
if any difference at all, as far as life expectancy is concerned.
 There are,
however, differences in the side effects of the various local therapies. Both RP
and radiation therapy (EBRT and brachytherapy) have a major impact on the HRQoL
(health-related quality of life). After RP the patient has maximum in negative
side effects, but over time some of them disappear, while the side-effects after
radiation are minimal but they increase in the course of time. Brachytherapy
showed no benefit relative to RP or EBRT in a cohort of 1213 men at the VA in
Ann Arbor (MI)13.
18. Recurrence after RP or Radiation -
Unfortunately, prostate cancer can come
back after local therapy. In a cohort of 2091 men, all operated by Dr. Walsh –
one of the best if not the best RP surgeon in the USA –, 16% had recurrence
after 5 years, 28% after 10 years, and 39% after 15 years14.
More than 1 of 3
men had recurrence! One easy method to predict recurrence is attaching a
numerical value to various predictors15:
PSA <6: 0 pts, 6.1-10: 1 pts, 10.1-20:
2 pts, 20.1-30: 3 pts, >30: 4 pts; GS 1-3/1-3: 0 pts, 1-3/4-5: 1 pt, 4-5/1-5: 3
pts; T stage T1/T2: 0 pts, T3a: 1 pts, Age <50 yrs: 0 pts, >50 yrs: 1 point. Sum
the points and the following scores indicate the recurrence percentages in a
group of 1,439 men who had undergone RP, after a median of 2 years: sum is 0:
1.3%, 1: 7%, 3: 18%; 5: 26%; 6: 37%; 7: 76% and 9: 100%. Radiation may be
prescribed after recurrence, and/or hormonal therapy. The recurrence percentages
after brachytherapy or EBRT appear similar to those after RP, but only in men
with similar ‘statistics’: age, PSA, and Gleason score.
19. Hormonal therapy is at present the only treatment available for patients
diagnosed with a positive bone scan, i.e., the cancer has spread into the bone
(but is still known as prostate cancer, not bone cancer). The same treatment is
for men who had a local therapy and had a recurrence: the PSA started to
increase after being undetectable for a period that may range between a few
months and dozens of years. Hormonal therapy is also commonly advised by
physicians as an adjunctive therapy for those with high-risk prostate cancer: T3
or T4, Gleason scores of 8-10, a PSA >20, or a cancer that has spread to the
lymph nodes. Adjunctive therapy is given in addition to a local therapy such as
RP or brachytherapy. Finally, a small but rapidly growing group of men chooses
to have hormonal therapy because they are not willing to undergo a local
treatment, or to wait watchfully.
The treatment of men who need or choose hormonal treatment is based on the
observation by Dr. Huggins (for which he received the Noble Prize) that prostate
cancer, at least initially, needs testosterone to grow. No testosterone, no
cancer growth. There are three hormonal therapies (HTs): a) stopping production
of testosterone with hormones; b) blocking the action of testosterone, and
c) orchiectomy (removing the testicles) which can not be reversed. It is
possible to combine a) and b) in CHT (Combined Hormonal Treatment) aka ADT2
(Androgen Deprivation Therapy). A good reason to combine the two is when
testosterone, which should be measured regularly, becomes unacceptably high (>20
ng/dl) with a) alone. Hormonal therapy can also be administered intermittently:
intermittent hormonal therapy or IHT (periods being on therapy are followed by
periods off therapy)16. Unfortunately, most men’s hormonal therapy will fail in
time (1-15 years).
a). Testosterone production is stopped by an injection (once a month, or once
every 3 or 4 months) of a so-called LHRH medicine (either Zoladex or Lupron) or
by estrogen patches. Zoladex or Lupron have the disadvantage that bones can
become weakened (osteoporosis) and medications against bone loss (Calcium +
Vitamin D, Fosamax or another bisphosphonate) will be necessary. Another option,
and less expensive is estrogen patches that do not weaken the bones, but make
the breasts sensitive. They also increase their size (gynaecomastia) which can
be neutralized, however, with a cosmetic operation.
b). The access of testosterone to the cancer cells can be blocked with anti-androgen (AA) medications: Eulexin, Casodex or Nilandron. An AA protein,
similar to testosterone, fits in the androgen receptor (AR), a messenger between
a testosterone molecule and the cancer cell. The AA is sufficiently different
from testosterone that no instructions from the AR will be forwarded to the
cancer cells while the AA blocks the access of testosterone to the AR. The
advantage of AA treatment is that libido and potency have a much better chance
to survive as compared with LHRH treatment; the disadvantage of this treatment
is that the preferred AA (3x50 mg Casodex) will cost $1,250+ per month. Casodex
also causes gynaecomastia.
c). Orchiectomy has one advantage and two disadvantages. It is inexpensive as
compared with LHRH or AA medicines, but not easily accepted psychologically.
Another drawback of orchiectomy is that it excludes IHT. IHT is rapidly becoming
more popular because it is easier ― libido and potency which normally disappear
during hormonal therapy may return during the off-periods (periods without
medications). Off periods may last longer if Proscar or Avodart is added17 to
ADT2: ADT3.
Eventually, the cancer cells become sensitive to very small amounts of
testosterone or they form androgen independent prostate cancer cells. Hormonal
therapy will fail: AIPC (androgen independent prostate cancer). PSA begins to
rise. This is not ‘the end’! There are several possible actions. First, the AA
may be stopped because the androgen receptors have changed and consider the AA
now as testosterone. The PSA goes down in 35% of all patients after the AA has
been withdrawn. Ketoconazole (Nizoral or generic), aminoglutethimide (Cytadren),
or estrogen patches (Climara or generic) can be prescribed by your doctor, and
as a result the PSA might go down, staying down for many months. If the PSA
keeps going up, chemotherapy can be considered as a solution but it will not
extend life for more than a few months, and is therefore mainly given as a
palliative medicine against pain.
20. Alternative therapy – most patients in our support group take various OTC
(over-the-counter) medicines, including vitamin E, lycopene, and selenium.
Studies have revealed that they influence the growth of prostate cancer: there
was less cancer and less metastatic lesions in those taking vitamin E (in
smokers; not necessarily in non-smokers)18; smaller cancers in those who took lycopene, and less prostate cancer mortality in men with high selenium. Numerous
medications induce decrease of cancer in rats and mice, but there is no great
urge to have clinical trials because those medicines are not patentable. A
noticeable exception is green tea of which a clinical trial demonstrated19 the
absence of success in men with metastatic prostate cancer. Of course, this fact
does not include the possibility that green tea may work in men with an earlier
disease stage. Soy and fermented soy (miso) are foods that may help, and other
OTC medicines include curcumin, quercetin, and EPA & DHA (fish oil). Medicines
that must be prescribed by a physician include calcitriol (Rocatrol), statin
drugs (e.g., Pravachol), Dostinex, and NSAIDs such as Celebrex and Sulindac.
These drugs have an impact on prostate cells in vitro (petri dish) and in vivo
(rats and mice), but are without a clinical trial demonstrating an effect on
prostate cancer in men.
In addition to medicines, life style changes such as dieting, vegetarianism and
stress reduction can be of help, in particular because they have an impact that
goes beyond prostate cancer. Men diagnosed with prostate cancer die in about
equal numbers of heart disease and prostate cancer, and life style changes do
have an impact on heart mortality rates: if it won’t help for prostate cancer,
it will at least help for heart disease! Acupuncture may help with pain.
In summary, about all men diagnosed with prostate cancer follow one or more of
the various alternative therapies; as this does not exclude another therapy they
should probably be known as complimentary or adjunct therapy. One of the most
promising adjunct therapies is combining vitamins C and K3 100:1. In vivo tests
were successful, and it is now waiting for the results of the first clinical
trial20.
What to Do?
Men diagnosed with prostate cancer have to make many choices: aggressive
surveillance or RP or brachytherapy? Hormonal treatment, and what type of
hormonal treatment? Which physician to choose for brachytherapy? For RP? For
robotic laparoscopic RP? One could argue that the disease management strategy
for men diagnosed with prostate cancer, T1c, PSA <10, and GS 6, can be on more
solid grounds if the diagnosis is followed by at least a few months on
aggressive surveillance. These men can learn more about prostate cancer in that
time period, and make better decisions.
All prostate cancer patients are encouraged to become knowledgeable about their
disease: learning the basics, asking questions, reading the literature, and
using the Internet. They’ll find themselves more at ease in their communication
with physicians.
Share your feelings with your partner, and come to the PCNG meetings – we won’t
give advice, but share our experiences, and you can learn from that. Stress and
depression are common after diagnosis, but we think that selfempowerment through
knowledge can be an excellent remedy. We wish you the best!
Books are, in our opinion, still an excellent source of information. “A Primer
on Prostate Cancer” by Stephen Strum and Donna Pogliano is very good, and so is
“Dr. Patrick Walsh's Guide to Surviving Prostate Cancer” by Patrick C. Walsh and
Janet Farrar Worthington. Look for more titles at pcngcincinnati.org, in LINKS,
category J.
References: 1
Int Braz J Urol. 2004 Mar-Apr;30(2):109-13 Miotto A Jr; 2
Eur Urol. 2003 May;43(5):528-34. Souverein PC; 3
Urology. 2004 Aug; 64, 311-5; Fradet Y; 4
Prostate. 2004 Nov 1;61(3):260-6. Postma R; 5 Pathologists for a 2nd
opinion familiar to Dr. Stephen Strum: David Bostwick (VA) [800] 214-6628;
Francisco J. Civantos (FL)[305] 325-5587; Jon Epstein (Hopkins) [410] 955-5043
or 410-955-2162; David Grignon (MI) 313-745-2520; Jon Oppenheimer (TN] [888]
868-7522; Dianon Laboratories 1 [800] 328-2666, and UroCor[800] 411-1839; 6
Urol Clin North Am. 2001 Aug;28(3):459-72. Moul JW; 7
Eur Urol. 2005 Jan;47(1):16-21. Klotz L; 8
Prostate Cancer Update, winter 2003, James Buchanan Brady Urological
Institute, Johns Hopkins U.; 9 AUA Annual
Meeting 2003, Abstract 286 Ornish D; 10
JAMA. 2005 May 4;293(17):2095-101. Albertsen PC; 11
J Urol. 2004 Nov;172:1835-9. Khan MA; 12
N Engl J Med. 2005 May 12;352(19):1977-84. Bill-Axelson A; 13
J Clin Oncol. 2002 Jan 15;20(2):557-66. Wei JT; 14
J Urol. 2003 Feb;169(2):517-23. Han M; 15
J Urol. 2005 Jun;173(6):1938-42. Cooperberg MR; 16
Oncologist. 2000;5(1):45-52.Strum SB; 17
ASCO 2005 Prostate Cancer Symposium, abstract 153, Scholz MC; 18
J Natl Cancer Inst. 1998 Mar 18;90(6):440-6. Heinonen OP; 19
Urol Oncol. 2005 Mar-Apr;23(2):108-13. Choan E; 20
J Nutr. 2001 Jan;131(1):158S-160S. Jamison JM.
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May 2005
20-Year Outcomes Following Conservative
Management of Clinically Localized Prostate Cancer
Peter C. Albertsen, James A. Hanley, and Judith Fine.
JAMA (Journal of the American Medical Association), May 4, 2005,
v.293:2095-2101.
This article was published a few days before Adrian Boie’s death. Some of its
major conclusions are summarized in a remarkable figure shown below.
Twenty graphs show the cause of death of men diagnosed with prostate cancer over
a time period of 13 years. They died of prostate cancer (dark gray in the
graphs) or something else (light gray).
The
original study population consisted of 767 men of different age (vertical
columns) and different cancer aggressiveness expressed as Gleason Score
(horizontal rows). None of the patients had received radical prostatectomy or
radiation therapy. Bone scan tests were performed on only 30% of the patients,
so quite a few patients might have had advanced instead of localized disease.
All patients began with watchful waiting, but many switched to hormonal therapy.
Within 6 months of diagnosis 42% had received DES or had had an orchiectomy!
Reading these
numbers one realizes that a diagnosis of prostate cancer meant something
strikingly different from what it means today, and that is because the PSA: the
prostate specific antigen for which a test became readily available at about the
time Adrian was diagnosed with prostate cancer.
Nowadays PSA-testing
results in diagnosing prostate cancer much earlier than twenty years ago, in
particular in slow-growing cancers. The size of prostate cancers identified by
PSA testing has decreased steadily since the mid eighties, and the net effect is
that prostate cancer mortality will be less in patients diagnosed with prostate
cancer today. More men are nowadays diagnosed with a relatively low Gleason
score and less advanced cancer than 20 years ago, and earlier diagnosis finds
cancers that are less significant. The average Gleason score is now considerably
less than it was when Adrian was diagnosed.
The Gleason
score in the 767 men, diagnosed between 1971 and 1984, is closely related to the
mortality due to prostate cancer. This becomes obvious when studying the
mortality rates. Those can be expressed as prostate cancer deaths per 1000
person-years: 6 per 1000 person-years for a Gleason score of 2-4 (138 patients),
12 for GS 5 (118), 30 for GS 6 (294), 65 for GS 7 (137) and 121 for GS 8-10
(80). Death because of prostate cancer is rare in men with lower Gleason scores
and common for those with the higher scores.
Adrian would have been in the 60-64 years column and the 8-10 Gleason score row.
He did far better than the great majority of the patients depicted in this
graph, and this gave him the opportunity to lead our prostate cancer support
group in Greater Cincinnati to success. Thank you, Adrian!
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April 2005
Highlights from the 2005 ASCO Prostate Cancer Symposium
During three days last February
oncologists attended in Orlando (FL) a Prostate Cancer Symposium sponsored by
ASCO (American Society of Clinical Oncology), the Prostate Cancer Foundation,
the American Society for Therapeutic Radiology and Oncology, and the Society of
Urologic Oncology.
Three hundred and eleven abstracts of the
presentations were published, and they are now all on line at the ASCO web site
(C8 in
pcngcincinnati.org/links). I read all abstract titles, and when the title
appeared interesting I read the abstract. What was read is summarized below.
Reference to the abstracts is made by number--clicking on this number will show
the abstract when this newsletter is read 'on-line', at pcngcincinnati.org. The
abstracts have also been collected in a
file.
There are also more highlights in the online edition of this newsletter than in
the paper edition―in the paper edition are the highlights of the highlights.
The symposium had 8 sessions in a logical order.
First the Risk Factors and Prevention were discussed (29 abstracts), than
Screening and Diagnosis (29). Localized Disease (86) was followed by Locally
Advanced and Recurrent Disease including Climbing PSA (35), Androgen Deprivation
therapy (aka Hormonal Therapy)(17), Refractory Hormonal Therapy (46), New
Therapeutic Developments (15), and finally, the Biology of Prostate Cancer (54).
-----Risk Factors and Prevention
In the first session two abstracts quantified what we already knew: don't be
overweight (BMI >25) or obese (BMI > 30) (Body Mass Index is the weight in
kilograms divided by the square of height in meters). In abstract
6 the
data from the Physicians Health Study were used. Among 22,071 US male physicians
aged 40 to 84 years at baseline in 1982, 2,144 were subsequently diagnosed with
CaP, of which 233 (11 %) died of CaP during 21 years of follow-up. Among the
2,144 men diagnosed with CaP during the follow-up, 3.4% were obese and 39.1%
were overweight at baseline. Adjusting for age at diagnosis and smoking status,
obese men had a 2-fold higher risk and overweight men had a
30% higher risk.
It was already known that HRQOL (Health-Related Quality Of Life) is a
function of education but the results were slightly suspicious because the
access to diagnosis and treatment was often not the same. In a new study
(abstract
21) 237 men all had access to the VA Healtcare System.
There was no difference between the educational groups in baseline PSA,
Gleason score, T-stage, or BMI, although men with less education were
significantly more likely to be diagnosed at an earlier date. However, patients
with less than a high school diploma reported lower HRQOL at baseline, a steeper
decline at 6 months post-treatment, and remained significantly lower at 12
months post-treatment than patients with some college and patients with an
undergraduate degree or higher.
Smoking (11) is not good either. Of 1787 patients, five years
after diagnosis, 75% of previous and non-smokers but only 65% of
current smokers were alive. After 10 years 10% of non-smokers but 22%
of current and previous smokers had a cancer other than prostate cancer (e.g.,
bladder cancer)
The next abstract (22) had information that I never expected: the type
of treatment a prostate cancer patient receives is partially a
function of the insurance he has. Compared to Medicare patients, men in the
Veteran's Administration system were more likely to receive brachytherapy than
radical prostatectomy, while patients with PPO insurance were less likely to
receive brachytherapy.(OR=0.57 95%CI 0.38-0.86). Men with PPO and HMO insurance
were less likely to receive hormonal therapy when compared to patients insured
by Medicare.
-----Screening and Diagnosis
In the first abstract in this session (32) we read about a new tool
that may distinguish between the tigers and pussycats in prostate cancer. A
first attempt (see March '05 PCNG Newsletter for details) to make that
distinction is based on the following: PSA density less than 0.15 ng/mL; the
Gleason sum 6 or smaller; cancer in fewer than 3 of the 6 cores obtained on
biopsy, and less than 50% cancer in each positive core. Using this information
74% of all insignificant tumors could be identified.
A better distinction would be welcome, of course, and the one discussed in
abstract
32 is with a bloodtest. According to the authors the “PSP94
level” was able to distinguish patients with high-grade disease. “PSP94
levels may also identify patients with lethal forms of prostate cancer”. I like
'tiger version of prostate cancer better than the term they use!
Are any newly diagnosed patients in Cincinnati staged on the base of
their PSP94 level?
Another abstract (35) presents data about the success of screening for
prostate cancer in the Quebec Province in Canada. In Quebec (and also in Tyrol,
Austria) screening with PSA and DRE resulted in less prostate cancer deaths,
speaking strongly in favor of screening. However, there is a study (BMJ
2002;325:740-743 Grace Lu-Yao, Peter C Albertsen, et al. see our
March 2003 PCNG
Newsletter) showing that prostate cancer mortality in Connecticut and the
Seattle area were about the same whereas screening was much more prevalent in
Seattle than in Connecticut. So the last word has not been said about screening.
I am, as most prostate cancer patients are, in favor of screening, although I
notice that education of the men both before and after screening is commonly
scanty at best. PSA and DRE are made but what the findings signify is not always
explained clearly. Anyhow, in the paper on screening in Quebec the decrease in
prostate cancer mortality between 1991 and 2002 is the most significant in
Montreal (from 66.5deaths per 100,000 men to 42.9) and Quebec City (from
74.2 per 100,000 men to 37.7). The latter city is the only one that has
been involved in a mass prostate cancer screening program coupled with clinical
trials of early treatment of the disease.
The questions have remained the same over the last years: screening: yes? no?
if there is cancer: what treatment? RP? Radiation? WW?. There are several
screening trials and treatment trials but there is only the ProtecT study (29)
combines screening with treatment. 500,000 men aged 50-69 years will be
randomized to participate in the ProtecT treatment trial or in the routine care
comparison arm.
Men in the ProtecT treatment trial are invited to take the PSA test. If the
level exceeds 3.0 ng/ml, they are invited for biopsy. Those found to have
localized prostate cancer are consented for randomization between radical
prostatectomy, radical conformal radiotherapy (EBRT) and aggressive surveillance.
By October 2004, 150,000 men have been randomized to the ProtecT treatment
trial (42,000) or the comparison arm (108,000). In the trial, 42,000 men have
received PSA tests, 4,000 a raised PSA level and biopsy (c. 10%), 1,102 cancers
detected (c.2% tested) and 550 have been randomized to radical prostatectomy,
radical conformal radiotherapy or active monitoring.
The effectiveness of treatments will be determined by survival at 10 years.
The strong points of this trial are the combination of screening and
treatment, and the large numbers. The results will be 'robust'. But why can
the men choose EBRT, and not brachytherapy?
Many men have their PSA measured annually. Why not after 2,3 or 5 years? Good
question, answered in a study (33) of 5387 men aged 45-80 years with a
PSA less than 3 ng/ml and no prostate cancer at their first screening visit.
Those men had 35,425 consecutive annual follow-up visits.
The time to a PSA more than 3 ng/ml significantly decreases with increasing
baseline PSA--- men with a PSA >1.5ng/ml should be screened every
year but men with a PSA lower than 1.0ng/ml at baseline could wait 4 to 5
years before being retested.
How many biopsies should a urologist take? The answer to this question is
given in a study presented in abstract
41: the number of biopsies could
be a function of the prostate volume!
Three hundred eighty three patients had an average positive biopsy rate of
41.5%. The best indicator for finding cancer was not the initial PSA nor the age
of the patient, but the VBR: prostate Volume/Biopsy Rate. Assuming that the
prostate volume is 28 cc (about average), the cancer detection rate is then with
14 cores 47% (VBR 2= 28/14; one core for each 2cc of prostate volume), with 7
cores 40% (VBR=4) and 27% (a VBR of 5).
Biopsies can discover pussycat or tiger (=aggressive) cancer.
Whether it will be one or the other can be based on the speed with which the PSA
is doubling: when it doubles fast the chance is large that there is an
aggressive cancer. The authors of abstract
61 define an aggressive cancer
when the Gleason Score is 8, 9 or 10. They studied 406 patients who underwent
1,069 biopsies. Aggressive cancer was in 41 patients (10.1%).
If the PSA was doubling in less than 2 years, the detection rate of
aggressive cancer was 42.2%, but if it was more than 5 years, the
detection rate of aggressive cancer was only 3.0%. “Patients at low risk
of harboring aggressive prostate cancer could reduce unnecessary biopsies and
potentially reduce the over-treatment of prostate cancer”.
-----Localized Disease
Laparoscopic radical prostatectomy (LRP) has been around for about 6
years in the USA, and robotic laparoscopic RP (RLRP) was introduced in
Cincinnati last year. How do they compare? Data on 331 LRPs and 191 RLRPs were
reviewed (99). There were no statistically significant differences
between the two groups. Three men in the LRP group and zero men in the RLRP
group were converted to open prostatectomy and the median operative time was 4.4
hours for the LRP group and 3.4 hours in the RLRP group.
The median number of days to complete continence in the LRP group was 118
days vs. 41 days in the RLRP group. Robotic prostatectomy appears not only
better than regular laparoscopic prostatectomy, but is also much easier to
learn.
Another study (123) concludes, based on a
retrospective review of 1707 patients treated from 1992 to 2004, that
brachytherapy and radical prostatectomy are equally good for low-risk prostate
cancer patients. However, in intermediate and high-risk patients
brachytherapy had better control rates. The addition of external radiation
with or without LHRH neoadjuvant therapy (Lupron, Zoladex, etc) improved
biochemical control rates in intermediate and high-risk brachytherapy patients.
Which factors predict satisfaction with the treatment of early prostate
cancer? 560 men were surveyed before treatment, immediately after choosing
therapy and at intervals thereafter (101). The men chose external beam
radiation (EBRT) most often (51%), with 38% RP, 10% WW or hormonal therapy, and
2% other treatments. 'Compared to RP patients, men choosing EBRT were older, had
more high-grade tumors and T3 tumors. They were 8 times as likely to cite
quality of life after treatment as their treatment goal and conceded a greater
role for the doctor in making a treatment decision. WW patients were still
older, but did not have high-grade or T3 tumors.'
Patients underestimated the side effects of their chosen treatment compared
to other men, but over 80% of men were satisfied with their decision.
This a rather strange set of men. Nobody choose brachytherapy? But the 80%
appears quite reasonable to me. After all, one cannot redo any treatment, and to
accept this notion and think positive about it is obviously the best response.
At our meetings patients are asked to share their data but only a few can say
something about their PSA velocity before diagnosis. PSA velocity is the
rate of PSA rise. In study
68, if it was less than 1 ng/ml per
year patients were free of cancer at 5 years, but if it was more than
1 ng/ml only 78% were free of cancer at 5 years.
The results of the study presented in abstract
106 are truly amazing.
The authors conclude that 13 months of TAB (Triple Androgen Blockade:
Lupron or Zoladex + Casodex or Eulexin + Proscar) followed by Proscar alone
should be explored “as a safe and viable alternative to surgery,
radiotherapy or brachytherapy in patients with local disease.” Median age was
67, mean baseline PSA was 11.1 ng/mL (range 0.39-59.8) and median Gleason score
(GS) of 7 (range 4-10). High risk PC (PSA > 20, or GS > 7, or T3 stage) was
documented in 59/183 (32%) of men.
At a median follow-up of 75 months (range 48-156; first 100 patients) mean
PSA is 3.3 ng/mL. Mean current testosterone is 487 ng/dl. A second cycle of AD has been
initiated in 14/183 men; all 14 of these men have high risk PC. One man
developed metastatic PC and died from progressive resistant PC. No man with
low- or intermediate-risk local PC has received a 2nd cycle of AD to date.
Five men have proceeded with deferred local therapy 3-6 years after TAB. Disease
specific survival is 99.4%.
The conclusion is that a single 13 month cycle of TAB combined with
Proscar maintenance provides excellent long-term control and management of
local PC, including in men with high-risk local PC. This triple androgen
blockade with Proscar continuing is also known as the Leibowitz treatment after
one of the authors of this abstract.
A similar study is described in another session of the Forum, but is
discussed here (153). The authors (Drs. Lam, Scholz, Strum and others)
treated 100 patients with IHT: Intermittent Hormonal Therapy. That is, a
period of androgen deprivation therapy (ADT) was followed by a period without
ADT but with Proscar (60 patients) or without Proscar (40 patients). Patients
went back on ADT when the PSA rose above either 2.5 in the Proscar group or 5.0
in the no-Proscar group--the median time off with Proscar was 24.0 months versus
8.7 months without Proscar.
Thirteen men have developed androgen independent PC. The patients had a
similar diagnosis as those of Dr. Leibowitz (median baseline characteristics
were age 66, PSA 15, and Gleason score 7), and one wonders how it was possible
that one group (Leibowitz) needs only one treatment with ADT, and the other
group (Lam et al.) more than one treatment.
In abstract
64 the HRQOL (Health-Related Quality of Life) of
RP patients is compared with that of EBRT patients, all with
clinically localized prostate cancer. Approximately 10.6% of the 47 RP patients
and 2.9% of the 49 EBRT patients were incontinent at 2 years; 26.5% of
EBRT and 6.1% of RP patients had bowel dysfunction at 2 years, and at 2
years sexual dysfunction was more prevalent in the RP than in the EBRT
group (70.2% versus 61.2%). Still, there was no decrease in the general HRQOL,
except in the first month after RP.
Satisfaction with the treatment decision as a function of the income of the
patient is the topic of abstract
80. Their conclusion is that income
levels may affect access to prostate cancer information and that more effort
must be made to improve patient education and treatment information for lower
income patients. Knowledge is power, and an empowered patient understands the
issues better and will be more easily satisfied with his treatment decision.
Empowering patients is one of the major tasks of the PCNG.
In abstract
129 our Dr. Barrett is the senior author of an
abstract addressing the question what PSA a patient should have after
brachytherapy. Between 1995 and 2002, 148 patients had Iodine seeds implanted.
The median age of the patients was 67 years (range 45-84); the median Gleason
score 6.07
(2 - 8), and the median pre-treatment PSA 6.7 ng/ml (1.6 - 17 ng/ml). All
patients were followed continuously with a median follow-up time of 55 months
(24 mo.-104 mo.). A nadir PSA level of 0.5 ng/dl is associated with a 91%
likelihood of biochemical disease control.
These results are considerably better than those of the 1992-2000 group of
200 patients described in Dr. Barrett's 2001 abstract (see
June 2001 PCNG
Newsletter): only 52% achieved and maintained a nadir of less than 0.5 ng/ml.
-----Locally Advanced and Recurrent Disease (including Climbing PSA)
COMPARE (Comprehensive Observational Multicenter Prostate Adenocarcinoma
Registry) will document the treatment decisions and outcomes for men with rising
PSA levels following RP or radiation (168). Progression will be assessed
using biochemical, radiological, and clinical changes including QOL.
COMPARE is an observational registry which examines clinical, pathologic, and
sociodemographic effects on treatment decision-making and outcomes. Race, age,
education, literacy, zipcode, marital status, and insurance access (in addition
to clinical correlates such as grade, stage, and Gleason score) will be assessed
in 3750 men. As of October 2004, 264 sites qualified for the registry.
It is amazing is what had to be done to get collaboration from those 264
sites:7,728 sites were contacted, and 19,163 telephone contacts made. I wonder
whether there are any sites in Greater Cincinnati.
Local therapy can be followed or preceded by hormonal therapy (=ADT -
Androgen Deprivation Therapy); the late ADT after local therapy has been shown
to be beneficial for intermediate and high-risk patients whereas ADT before
local therapy (“early ADT”) has not been of much help. What about early
chemotherapy?
In abstract
169 a study is described in which 48 men had at least 1
cycle of chemotherapy prior to surgery - we will have to wait a long time
before it is known whether 'early chemo' might become advisable for high-risk
patients.
-----Androgen Deprivation Therapy
Hot flashes are part of hormonal therapy. Placebo-controlled trials have
shown that 25% of patients respond to placebo treatment. A much
larger percentage, 73% responds to acupuncture treatment (155).
Bone Mineral Density (BMD) decreases during the first 12 months of hormonal
treatment, but it decreases considerably less in men who have a higher BMI (Body
Mass Index) and taking calcium and vitamin D supplements and drinking at
least 1 glass of wine per day (148). Being overweight is thus not all
bad, and the daily glass of wine I drink because it is good for my heart turns
out to be good for my my bones as well!
An exciting trial at Memorial-Sloan Kettering in NYC is described in
abstract
145. Patients with a rising PSA received six cycles of treatment
during four weeks: three weeks of Lupron + Taxotere followed by one week of
Androgel (a gel that rubbed in the skin increases testosterone). PSAs as low
PSA as< 0.05 ng/ml following prostatectomy or < 0.5 ng/ml following radiation
were achieved in some patients.
We have to wait and see whether this short-term Intermittent ADT/Chemo
therapy with a testosterone boost during the ‘off’ period will be
effective, but the preliminary data presented in abstract
145 are
promising indeed.
Reading a study is most exciting when it can be applied to one's own
situation. I have had a Zometa |