Former US president Joe Biden has been diagnosed with an "aggressive" form of prostate cancer and is reviewing treatment options, a statement from his office said Sunday.

On Friday the 82-year-old Democrat was "diagnosed with prostate cancer ... with metastasis to the bone," the statement said.

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