NEW YORK, May 18 (Xinhua) -- U.S. former President Joe Biden was diagnosed with aggressive form of prostate cancer on Friday, said a statement from his personal office on Sunday.

The cancer, characterized by a Gleason score of 9 (Grade Group 5), has metastasized to the bone, said the statement.

Earlier, Biden reported urinary symptoms, which led doctors to find a "small nodule" on his prostate.

"While this represents a more aggressive form of the disease, the cancer appears to be hormone-sensitive which allows for effective management," said the statement.

"The president and his family are reviewing treatment options with his physicians," added the statement.

Aged 82, Biden served as U.S. President from January 2021 to January 2025 as the oldest-serving president in the history of the United States.