WASHINGTON (AP) — Former President Joe Biden has been diagnosed with prostate cancer, his office said Sunday.

Biden was seen last week by doctors after urinary symptoms and a prostate nodule was found. He was diagnosed with prostate cancer on Friday, with the cancer cells having spread to the bone. His office said he has stage 9 cancer.

“While this represents a more aggressive form of the disease, the cancer appears to be hormone-sensitive which allows for effective management,” his office said. “The President and his family are reviewing treatment options with his physicians.”

Prostate cancers are given a score called a Gleason score that measures, on a scale of 1 to 10, how the cancerous cells look compared with normal cells. Biden’s score of 9 suggests his cancer is among the most aggressive.

When prostate cancer spreads to other parts of the body, it often spreads to the bones. Metastasized cancer is much harder to treat than localized cancer because it can be hard for drugs to reach all the tumors and completely root out the disease.