Biden has Cancer

It has been reported that President Biden has an aggressive form of prostate cancer that has metastasized to his bones.  Was this only discovered since he left office or has this been kept under wraps for longer?  Back in 2022, President Biden claimed that he had cancer that had been caused by oil refinery pollution in Delaware.  Was this a case of the President going off script, but revealing something that was true?  Has he had cancer since 2022?  If the White House and the media were so busy keeping signs of senility out of the news, what are they odds that they also opted not to talk about a cancer diagnosis.