Biden was treated for a blood clot in his lung in 1988, per The Washington Post. The clot came one month after the then-senator underwent emergency surgery for the first aneurysm. At the time, bed rest following the surgery was thought to have led to the subsequent clot.

Biden's cancer is characterized as having a Gleason score of 9. Here's what to know about the system for describing prostate cancer and what it means.

Former President Joe Biden, 82, was diagnosed with advanced prostate cancer with a Gleason score of 9 that has spread to his bones.

Former President Joe Biden had a small nodule on his prostate, according to a spokesperson, that required further evaluation.