Drug may slow growth of early prostate cancer

This is the first time that a drug for treating enlarged prostates also has been shown to help treat prostate cancer in a rigorous study. It may persuade more men to choose active surveillance, or "watchful waiting," instead of rushing to have treatments that can leave them with urinary or sexual problems, doctors say.

However, the results also show that most of these men do very well with no treatment at all.

"We're identifying men who are not likely to need even a pill," said Dr. Maha Hussain, a University of Michigan cancer specialist. But Americans fear cancer so much that they want some kind of treatment and underestimate the financial and medical risks of treating low-risk cases, she added.

She is program chair of a cancer conference in Florida where the study will be presented later this week. Results were released Tuesday in a telephone news conference sponsored by the American Society for Clinical Oncology.

Roughly half of the 218,000 men diagnosed each year in the United States with prostate cancer have low-risk disease -- PSA blood levels under 10 and low tumor aggressiveness scores.

The study enrolled about 300 men in the United States and Canada with low-risk cancer that was confirmed by a biopsy.