Los Angeles ? New guidelines for prostate cancer screening issued Wednesday emphasize that physicians should better educate men about both the risks and benefits of using the PSA test for screening.

They also call for cutbacks in the use of digital rectal exams to find tumors and recommend the end of mass prostate screening programs at health fairs and other sites.

The revised guidelines issued by the influential American Cancer Society come on the heels of several studies suggesting that large numbers of tumors identified by PSA screening are inconsequential and that biopsies and treatment produce more harm than those tumors would.