Doctors said the surgery was successful. 'The senator is now resting comfortably,' Dr. Peter Scardino, chairman of department of surgery at Memorial Sloan-Kettering, said in a statement. 'He is expected to be in the hospital for a few days. It is anticipated that he will be able to return to full activity within a few weeks.' Dodd, 65, announced last month that he had been diagnosed with early-stage prostate cancer and was scheduled to undergo surgery while the Senate was on its August recess. 