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Aspirin use associated with lower risk of cancer death for men with prostate cancer

2010-10-26
(Press-News.org) Men with prostate cancer who take anticoagulants like aspirin in addition to radiation therapy or surgery may be able to cut their risk of dying of the disease by more than half, according to a large study presented on November 3, 2010, at the 52nd Annual Meeting of the American Society for Radiation Oncology (ASTRO) in San Diego. The study involved more than 5,000 men with localized cancer whose disease had not spread beyond the prostate gland.

"Evidence has shown that anticoagulants may interfere with cancer growth and spread," Kevin Choe, M.D., Ph.D., lead author of the study and a radiation oncologist at University of Texas Southwestern Medical School in Dallas, said. "If the major effect of anticoagulants is preventing metastasis (the ability of cancer cells to spread to other parts of the body), this may be why previous clinical trials with anticoagulation medications produced mixed results, since most patients in these trials already had metastasis. If the cancer has already metastasized, then anticoagulants may not be as beneficial."

Researchers evaluated data from the Cancer of the Prostate Strategic Urological Research Endeavor (CaPSURE) database to investigate the effect of anticoagulation medications (aspirin, warfarin, clopidogrel and/or enoxaparin) on the risk of dying from prostate cancer among men whose cancer has not metastasized.

The study involved 5,275 men whose cancer had not spread beyond the prostate gland (localized prostate cancer) and were treated with surgery or radiation, two of the most common treatment modalities for prostate cancer. Of these patients, 1,982 were taking anticoagulants. Patients were classified as having high-, intermediate- or low-risk disease.

Results of the study show that the use of anticoagulants among prostate cancer patients treated with either surgery or radiation reduced the risk of dying from the disease from 10 percent to 4 percent at 10 years. The risk of developing bone metastasis was also reduced. In addition, findings reveal that the benefit appeared even greater among patients diagnosed with high-risk prostate cancer. This is exciting news as patients with high-risk disease have the most aggressive cancer, with a high likelihood of dying from the disease, and the treatment options are currently limited.

The study also found that the benefit was most prominent with aspirin, compared to other anticoagulants.

Choe said, "Findings from this study are promising, however, further studies are necessary before the addition of aspirin to prostate cancer therapy becomes standard treatment."

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For more information on radiation therapy for prostate cancer, visit www.rtanswers.org.

The abstract, "Aspirin Use and the Risk of Prostate Cancer Death in Men Treated with Prostatectomy or Radiotherapy: Results from the CaPSURE Database," will be presented at a scientific session at 1:45 p.m. on Wednesday, November 3, 2010. To speak to the lead author of the study, Kevin Choe, M.D., Ph.D., please call Beth Bukata or Nicole Napoli on October 31 – November 2, 2010, in the ASTRO Press Room at the San Diego Convention Center at 619-525-6313 or 619-525-6314. You may also e-mail them at bethb@astro.org or nicolen@astro.org.

END



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[Press-News.org] Aspirin use associated with lower risk of cancer death for men with prostate cancer