Joe Biden has advanced prostate cancer with a Gleason score of 9. What does this mean?

Photo: Former President Joe Biden on November 22, 2024. Official Biden White House Archive photo by Adam Schultz via Flickr. US government work. Article by Sarah Diepstraten and John (Eddie) La Marca. The Conversation – May 19, 2025.

Former US President Joe Biden has been diagnosed with an aggressive form of prostate cancer that has already spread to his bones. A statement Biden’s office issued on Sunday revealed Biden was diagnosed after experiencing urinary issues. Biden’s office said his cancer has a Gleason score of nine out of ten. It also said his cancer “appears to be hormone-sensitive, which allows for effective management”. So what is a Gleason score? And what does it mean for a cancer to be hormone-sensitive? […]

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