Prostate cancer is one of the most common types of cancer in men and grows very slowly, says NLM. Chances of a diagnosis increases with age.

Joe Biden’s cancer diagnosis has raised big questions about his health and future. At 82, the former president is battling metastatic prostate cancer, which doctors say has already spread to his bones.

There’s a lot we don’t know about the former president’s condition and probably didn’t need to know it earlier.