.A leading cancer doctor who served as an adviser to the Biden administration explained his surprise that former President Joe Biden’s prostate cancer diagnosis was missed until now.Ezekiel Emanuel, an oncologist who sat on Biden’s Covid Advisory Board, said on Monday that the 82-year-old could have had the disease “for many years, maybe even a decade” given that it has spread to the bone.Appearing on MSNBC’s Morning Joe, Emanuel suggested Biden may have chosen not to take a prostate cancer screening test, or that the White House failed to report any results.Emanuel, a prominent figure in Democratic health policy circles who helped craft the Affordable Care Act, was not involved in Biden’s diagnosis.On Sunday, Biden’s office