articleThe Brief Former President Joe Biden’s prostate cancer has spread through his body, making it "very painful and debilitating," his son Hunter Biden told the BBC Friday. Former President Joe Biden’s prostate cancer has metastasized "into his bones and further," his son Hunter Biden said. Joe Biden’s cancer spreadsWhat they're saying:"The cancer has spread, metastasized into his bones and further," Hunter Biden said. RELATED: Biden undergoing radiation for prostate cancerBut Hunter Biden said his father remains "out there," speaking publicly about the issues that are important to him. Biden’s cancer diagnosisThe backstory:Biden announced his cancer diagnosis in May 2025, less than four months after leaving office.