Medical experts have questioned claims that failure to test Joe Biden for prostate cancer was a routine omission.
Last week, the ex-president's office said the 82-year-old, who left office in January, was diagnosed with an 'aggressive' form of prostate cancer that spread to his bones.
According to Biden's aides, doctors stopped testing his prostate-specific antigens in 2014, despite US guidelines that suggest all men over 70 require routine testing.
Since the announcement of his diagnosis, several doctors have questioned how the vicious disease was not detected earlier in the former US president - who is supposed to have had access to some of the best medical care available.
'To take a blood test from a man over 50 and not do a PSA is practically an assault. It is the most male-specific health-related blood test you can do,' a senior surgeon told The Telegraph.
