The active ingredient in Propecia, a baldness remedy approved by the Food and Drug Administration in 1997, is showing new promise as a way to prevent some prostate cancers. AP hide caption

Sally O'Neill decided to have a double mastectomy rather than "do a wait-and-see." Richard Knox/NPR hide caption

At least they're talking. iStockphoto.com hide caption

A billboard advertising robotic surgery hangs outside Boston's Fenway Park in 2009. Hospitals and doctors have heavily promoted robotic surgery. Charles Krupa/AP hide caption

Terry Dyroff, of Silver Spring, Md., had a PSA blood test that led to a prostate biopsy. The biopsy found no cancer but did give him a life-threatening infection. Jose Luis Magana/AP hide caption

When is the right time to check the PSA box? iStockphoto.com hide caption

Radiation therapist Jean Etienne holds a range compensator, which shapes the depth to which the proton beam enters a patient's body to target a tumor. Rebecca Davis/NPR hide caption

Dr. Karen Lindsfor, a radiologist at the University of California, Davis, Medical Center, reads a mammogram in Sacramento, Calif. Rich Pedroncelli/AP hide caption

Surgery for prostate cancer shouldn't be an automatic choice, a new study says. iStockphoto.com hide caption

Terry Dyroff, at home in Silver Spring, Md., got a PSA blood test that led to a prostate biopsy. The biopsy found no cancer, but it gave him a life-threatening infection. Jose Luis Magana/AP hide caption