Former U.S. President Joe Biden’s prostate cancer has spread beyond his bones and is causing significant pain, according to his son, Hunter Biden, who discussed his father’s health in a BBC interview. Speaking to the BBC’s “Newsnight,” Hunter Biden said the cancer had “metastasized into his bones and further,” describing the illness as painful and debilitating. A spokesperson for Biden declined to comment on Hunter Biden’s latest remarks. Biden, 83, announced less than four months after leaving the White House that he had been diagnosed with an aggressive form of prostate cancer. Hunter Biden’s disclosure has renewed attention on Joe Biden’s health as the former president continues treatment for metastatic prostate cancer.