Former President Joe Biden has been diagnosed with prostate cancer, his office said Sunday.

Biden was seen by doctors last week after urinary symptoms and a prostate nodule were found. He was diagnosed with prostate cancer on Friday, with the cancer cells having spread to the bone.

“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 office said his score was 9, suggesting 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.

Many political leaders sent Biden their wishes for his recovery.

President Donald Trump, a longtime political opponent, posted on social media that he was saddened by the news and “we wish Joe a fast and successful recovery.”

Biden’s vice president, Kamala Harris, said on social media that she was keeping him in her family’s “hearts and prayers during this time.”

“Joe is a fighter — and I know he will face this challenge with the same strength, resilience, and optimism that have always defined his life and leadership,” Harris wrote.