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High Dose Radiation for Prostate Cancer Won't Raise Sexual Dysfunction
Date:10/30/2007

Half the men were assigned to receive 2 Gray (Gy -- a measurement of radiation) in 38 sessions spread over seven and a half weeks.

The other half were exposed to 2.7 Gy in 26 sessions spread over just five weeks.

All the patients then completed questionnaires regarding treatment side effects six months, 12 months, and 24 months following radiation.

Older age, as well as poor sexual function prior to radiation, did increase the risk for sexual impairment after radiation treatment, the researchers said. However, they report no appreciable difference in sexual function between the men receiving the shorter course/higher dose regimen or the more conventional regimen.

"The key to curing more prostate cancer is to give higher does of radiation," observed Horwitz. "And over the last few years, more and more men have been getting higher dose radiation, because the radiation oncology community knows that dose matters and that low dose radiation is just not effective compared to high dose. And this study shows that we have the ability to give these high doses in different ways, and in all these ways, men do very well."

Horwitz said he and his colleagues plan to take the current research to the next level.

"We will build on this experience and go with even higher doses," he said, "to see how that impacts not only sexual function but urinary and bowel function as well."

Dr. Peter T. Scardino is chairman of the department of urology and head of the Prostate Cancer Program at the Memorial Sloan-Kettering Cancer Center in New York City. He described the finding as a small but important step toward developing shorter course/higher dose radiation therapies.

"This is the trend nowadays," said Scardino. "This is where this is going: toward a time when perhaps we will be giving radiation therapies all in a single day."

"Animal studies have already indicated that you may be able to achieve as much
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