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Highly targeted radiation technique minimizes side effects of prostate cancer treatment
Date:10/25/2010

Men with prostate cancer treated with a specialized type of radiation called intensity modulated radiation therapy (IMRT) have fewer gastrointestinal complications compared to patients treated with conventional three-dimensional conformal radiotherapy (3D-CRT), according to a study presented November 1, 2010, at the 52nd Annual Meeting of the American Society for Radiation Oncology (ASTRO).

"With survivors living many years after treatment, it is very important to minimize gastrointestinal and urinary side effects to allow patients to live a full life after treatment," Justin Bekelman, M.D., lead author of the study and a radiation oncologist at the University of Pennsylvania in Philadelphia, said. "We specifically looked at IMRT, given its potential to minimize radiation side effects and its higher cost compared to other treatments. Our study shows there is a benefit for men with prostate cancer to receive IMRT over conventional treatment in terms of gastrointestinal side effects. But there is no difference between the two treatments in terms of urinary side effects."

The prostate gland is near both the rectum and the bladder, so doctors must be very careful to spare these healthy tissues to avoid complications when attacking the cancer.

Prostate cancer is the most common cancer in American men, with more than 185,000 men diagnosed with the disease each year. Fortunately, the disease is very manageable and often curable, with 98 percent of patients living at least five years after their diagnosis.

IMRT and 3D-CRT are special types of external beam radiation therapy where radiation is directed through the skin to the cancer and the immediate surrounding area to destroy the tumor and any stray cancer cells. Treatments are painless, much like receiving an X-ray.

Policymakers and clinicians have highlighted the need for comparative studies of prostate cancer treatments. However, there is little evidence comparing IMRT
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Contact: Beth Bukata
bethb@astro.org
703-839-7332
American Society for Radiation Oncology
Source:Eurekalert

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