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Combining Radiation Modalities Increases Prostate Cancer Cure Rates

02.08.2004


High-risk prostate cancer patients who undergo a combination of hormonal therapy, radioactive seed implant (also called brachytherapy) and external beam radiation therapy are shown to have an increased chance of cancer cure, according to a new study published in the August 1, 2004, issue of the International Journal of Radiation Oncology*Biology*Physics, the official journal of ASTRO, the American Society for Therapeutic Radiology and Oncology.



Historically, high-risk prostate cancer has been a therapeutic challenge for physicians, despite their efforts to cure patients by aggressively treating them with either surgery, brachytherapy or external beam radiation. Previous studies have shown the 5-year freedom from recurrence rates for high-risk patients treated with just one of these treatments to be between 0 and 50 percent, with up to half of these failures occurring where the original tumor was found.

To see if combining therapies would decrease recurrence rates for men with high-risk prostate cancer, 132 patients with high Gleason scores, with high prostate-specific antigen (PSA) scores or who were at an advanced clinical stage of prostate cancer were studied. A three-pronged approach that included brachytherapy, external beam radiation therapy and hormonal therapy produced an 86 percent rate of freedom from recurrence after five years. In addition, 47 of the original 132 patients in the study had a prostate biopsy performed two years after the end of treatment and 100 percent of them showed no evidence of the cancer recurring.


“This is a very exciting study because it shows that this new approach of combining brachytherapy, external beam irradiation and hormonal therapy to cure prostate cancer can be very effective for men with aggressive forms of the disease,” said Richard G. Stock, M.D., lead author of the study and Chairman of the Department of Radiation Oncology at the Mount Sinai School of Medicine in New York. “The data also supports the theory that enhanced local control can improve overall disease control.”

For more information on radiation therapy for prostate cancer, please visit http://www.astro.org/patient/treatment_information/ for a free brochure.

ASTRO is the largest radiation oncology society in the world, with more than 7,500 members who specialize in treating patients with radiation therapies. As a leading organization in radiation oncology, biology and physics, the Society is dedicated to the advancement of the practice of radiation oncology by promoting excellence in patient care, providing opportunities for educational and professional development, promoting research and disseminating research results and representing radiation oncology in a rapidly evolving socioeconomic healthcare environment.

| newswise
Further information:
http://www.astro.org

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