How was Joe Biden’s cancer not caught earlier? The news that the former president is battling an aggressive, stage-4 prostate cancer that has spread to the bone ignited a public debate about why a person with peerless access to medical care was diagnosed at such an advanced stage with a disease that is quite common in men his age.

Former President Joe Biden is being treated for prostate cancer, one of the most common cancers among men. Biden’s cancer is an aggressive form of the disease, and has spread to his bones, according to a statement released Sunday by his office.

The form of cancer Joe Biden has is one of the most common cancers to affect men. Here are the warning signs to watch out for.