Doctors have substantiated the claim, saying it is unlikely the cancer wasn't caught earlier, with the top-of-the-line medical care a president receives.

It’s aggressive. The cells have an ugly, disordered appearance under a microscope. Pathologists gave them a Gleason score of 9 (out of 10) for their likelihood to advance quickly. The cancer has already moved from Biden’s prostate to his bones, which means it cannot be cured — only controlled with drugs.

The news of former President Biden’s prostate cancer diagnosis is putting a spotlight on his physician, Kevin O’Connor, and whether he took adequate measures to monitor Biden’s health. Biden’s

Former President Joe Biden will require "further evaluation" after a small prostate nodule was discovered during a recent physical examination. "In a routine physical exam a small nodule was found in the prostate which necessitated further evaluation," a spokesperson told ABC News.