dr. scholz nonetheless advocates far less aggressive treatment for most patients. - hundreds and now even thousands of men are living with known prostate cancer and undergoing no treatment whatsoever. this is an approach called active surveillance that has become standardized. - johns hopkins has the largest active surveillance group in the country but strictly defines who is eligible. - patients who are candidates for active surveillance at johns hopkins are individuals over 65 years of age who have a diagnosis of the lowest grade of prostate cancer. - mark kleckner chose to have his prostate gland surgically removed at hopkins in 2009. - a few weeks later, i got the wonderful call from pathology that i had clear margins and the surgery was a success from a cancer perspective. and another week later, i got the catheter out, and you know, everything worked just like it was supposed to. i hope that the science behind prostate cancer can be advanced to the point where maybe my sons won't have to go through what i did. - and joining us now is dr. peter pinto, a urologic oncologist and senior