Former President Joe Biden is battling an "aggressive" form of prostate cancer, his office announced on Sunday, adding his condition is characterized by a "Gleason score of 9." Biden's cancer diagnosis comes after a small nodule was found in the former president's prostate after "a routine physical exam" on Tuesday. In February 2023 -- while the now-82-year-old former president was serving in the White House -- Biden had a lesion removed from his chest that was cancerous, according to the former White House physician.