Medical Forum / Diseases and Disorders / Prostate Cancer / February 2008
No easy Answers to what to do
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George Conklin - 28 Feb 2008 01:19 GMT ------From the New York Times several days back------
No Answers for Men With Prostate Cancer (February 5, 2008)
This month, the Agency for Healthcare Research and Quality issued a sweeping review of prostate cancer treatments, including surgical removal, radiation, hormone therapy and so-called watchful waiting, which involves careful monitoring but no active treatment until the cancer shows signs of growing.
Because none of these treatments emerged as superior, the agency came to the troubling conclusion that it could not recommend one over the others.
"Having been involved in this area for a long time, it was not shocking, but it is disappointing," said Dr. Timothy J. Wilt, lead researcher on the report, from the Minneapolis Veterans Affairs Center for Chronic Disease Outcomes Research. "Information is really lacking to determine whether over all one treatment is more effective and preferred."
Prostate cancer is the single most common cancer in the United States and the second most lethal among men after lung cancer. In 2008, the American Cancer Society estimates, 186,320 men will learn that they have it and 28,660 will die from it. The estimates for breast cancer are 182,460 and 40,480.
Prostate cancer is often diagnosed with a blood test that looks for prostate-specific antigen, P.S.A. There is widespread consensus that the test casts too wide a net, resulting in overdiagnosis and overtreatment. And the treatment can be devastating, leaving men impotent, incontinent or both.
The reasons behind the lack of data on prostate cancer are complex. A lack of financing and advocacy have roles. But so does the fact that prostate tumors grow slowly and can take 10 or more years to turn deadly. Not only does that make the disease particularly expensive and time consuming to study, but it is also a built-in disincentive for the drug industry, which typically has patent protection from 7 to 20 years.
A bigger obstacle to finding answers may be the patients, who have long been reluctant to participate in clinical trials, and their doctors, who tend to scorn such trials because they are already convinced that their chosen treatment is the best option.
One major clinical trial called Spirit, for Surgical Prostatectomy Versus Interstitial Radiation Intervention Trial, would have compared surgical removal with brachytherapy, which involves implanting radioactive seeds. Just 56 of the 1,980 needed patients enrolled, and the trial was called off in 2004.
"Men don't go into the clinical trials," said Dr. Daniel P. Petrylak, associate professor of medicine and director of the genitourinary oncology program at the Columbia University Medical Center. "That's the whole problem. Patients ask me all the time, 'What is the best treatment?' And I can't give them an evidence-based approach for that, because we don't have the data."
Prostate doctors and patient advocates often compare their cause with that of the other leading sex-specific cancer: one of the largest prostate cancer support groups is called Us Too, a play on the Y-ME National Breast Cancer Organization. The dismal state of prostate cancer research and advocacy pales in comparison to the campaign against breast cancer.
"We're at least a decade behind where breast cancer awareness is," Thomas Kirk, president of Us Too, said. "We need to catch up. The lessons learned by breast cancer are the ones we're trying to apply to prostate cancer."
Prostate cancer groups have tried to replicate the success of the pink ribbon campaign with their own blue ribbon, but it has yet to gain widespread acceptance. A group advocating the development of imaging technology for prostate screening created a mascot, Prosty the Spokesgland, complete with a theme song, to the tune of "Frosty the Snowman." Not surprisingly, it has not caught on, either.
Government spending for prostate cancer lags, too. In 2007, the National Cancer Institute spent an estimated $551.1 million on breast cancer research and $305.6 million on prostate cancer. For 2008, the Defense Department, which has a history of supporting health research, has allocated $138 million for breast cancer and $80 million for prostate cancer.
Prostate cancer researchers say the real problem is not so much financing as enlisting doctors and patients on board for clinical trials.
By 2010, men should have some answers from Pivot, the Prostate Cancer Intervention Versus Observation Trial, which is comparing surgical removal with watchful waiting. Results of studies looking at P.S.A. screening as well as the preventive benefits of the supplements vitamin E and selenium are also expected in a few years.
"This is the state of prostate cancer," Mr. Kirk of Us Too said. "There aren 't any clear answers."
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As I have posted here before, the article confirms that women are 20 + years ahead of men demanding evidence-based treatments for breast cancer. The studies to do the same for men could not even get volunteers!!!!
ron - 28 Feb 2008 02:02 GMT > ------From the New York Times several days back------ > [quoted text clipped - 90 lines] > ahead of men demanding evidence-based treatments for breast cancer. The > studies to do the same for men could not even get volunteers!!!! The meta-analysis that these comments are based on only included studies completed by 2003 or thereabouts. Here are several references to more recent studies that may be of interest...ron
The following study is the only long-term, randomized, prospective study to compare treatment options. It compares WW and RP; at a median follow-up of 8.3 years (results estimated to 10 years), it shows that RP reduces disease-specific mortality, overall mortality, and the risks of metastasis and local progression.
N Engl J Med. 2005 May 12;352(19):1977-84; Radical prostatectomy versus watchful waiting in early prostate cancer; Bill-Axelson A, Holmberg L, Ruutu M, Haggman M, Andersson SO, Bratell S, Spangberg A, Busch C, Nordling S, Garmo H, Palmgren J, Adami HO, Norlen BJ, Johansson JE; Scandinavian Prostate Cancer Group Study No. 4.
The following long-term studies also show a survival advantage associated with treatment and compare RP, RT and WW:
Urology. 2006 Dec;68(6):1268-74; Long-term survival probability in men with clinically localized prostate cancer treated either conservatively or with definitive treatment (radiotherapy or radical prostatectomy); Tewari A, Raman JD, Chang P, Rao S, Divine G, Menon M.
J Urol. 2007 Mar;177(3):911-5; Long-term survival in men with high grade prostate cancer: a comparison between conservative treatment, radiation therapy and radical prostatectomy--a propensity scoring approach; Tewari A, Divine G, Chang P, Shemtov MM, Milowsky M, Nanus D, Menon M.
J Urol. 2007 Mar;177(3):932-6; 13-year outcomes following treatment for clinically localized prostate cancer in a population based cohort; Albertsen PC, Hanley JA, Penson DF, Barrows G, Fine J.
Arch Intern Med. 2007 Oct;8;167(18):1944-50; Short- and Long-term Mortality With Localized Prostate Cancer; Merglen A, Schmidlin F, Fioretta G, Verkooijen HM, Rapiti E, Zanetti R, Miralbell R, Bouchardy C.
The following reference just compares RP and RT:
J Clin Oncol. 2003 Jun 1;21(11):2163-72; Cancer-specific mortality after surgery or radiation for patients with clinically localized prostate cancer managed during the prostate-specific antigen era; D'Amico AV, Moul J, Carroll PR, Sun L, Lubeck D, Chen MH
George Conklin - 28 Feb 2008 22:04 GMT On Feb 27, 6:19 pm, "George Conklin" <n...@earthlink.net> wrote:
> ------From the New York Times several days back------ > [quoted text clipped - 90 lines] > ahead of men demanding evidence-based treatments for breast cancer. The > studies to do the same for men could not even get volunteers!!!! The meta-analysis that these comments are based on only included studies completed by 2003 or thereabouts. Here are several references to more recent studies that may be of interest...ron
The following study is the only long-term, randomized, prospective study to compare treatment options. It compares WW and RP; at a median follow-up of 8.3 years (results estimated to 10 years), it shows that RP reduces disease-specific mortality, overall mortality, and the risks of metastasis and local progression.
N Engl J Med. 2005 May 12;352(19):1977-84; Radical prostatectomy versus watchful waiting in early prostate cancer; Bill-Axelson A, Holmberg L, Ruutu M, Haggman M, Andersson SO, Bratell S, Spangberg A, Busch C, Nordling S, Garmo H, Palmgren J, Adami HO, Norlen BJ, Johansson JE; Scandinavian Prostate Cancer Group Study No. 4.
The following long-term studies also show a survival advantage associated with treatment and compare RP, RT and WW:
Urology. 2006 Dec;68(6):1268-74; Long-term survival probability in men with clinically localized prostate cancer treated either conservatively or with definitive treatment (radiotherapy or radical prostatectomy); Tewari A, Raman JD, Chang P, Rao S, Divine G, Menon M.
J Urol. 2007 Mar;177(3):911-5; Long-term survival in men with high grade prostate cancer: a comparison between conservative treatment, radiation therapy and radical prostatectomy--a propensity scoring approach; Tewari A, Divine G, Chang P, Shemtov MM, Milowsky M, Nanus D, Menon M.
J Urol. 2007 Mar;177(3):932-6; 13-year outcomes following treatment for clinically localized prostate cancer in a population based cohort; Albertsen PC, Hanley JA, Penson DF, Barrows G, Fine J.
Arch Intern Med. 2007 Oct;8;167(18):1944-50; Short- and Long-term Mortality With Localized Prostate Cancer; Merglen A, Schmidlin F, Fioretta G, Verkooijen HM, Rapiti E, Zanetti R, Miralbell R, Bouchardy C.
The following reference just compares RP and RT:
J Clin Oncol. 2003 Jun 1;21(11):2163-72; Cancer-specific mortality after surgery or radiation for patients with clinically localized prostate cancer managed during the prostate-specific antigen era; D'Amico AV, Moul J, Carroll PR, Sun L, Lubeck D, Chen MH
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I suggest you write to the authors and tell them you know more than they do.
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