"Cancer touches us all," Biden wrote on social media on Monday morning. On Sunday, Biden's office disclosed that he was diagnosed with an aggressive form of prostate cancer that has spread to his bones. Biden's office said that he was diagnosed on Friday with prostate cancer "characterised by a Gleason score of 9 (Grade Group 5) with metastasis to the bone". What we know about Biden's prostate cancer diagnosisAnalysis: Cancer diagnosis is another formidable challenge Biden said his diagnosis was made after he reported urinary symptoms which led doctors to find a small nodule on his prostate. In the wake of the cancer diagnosis, many have offered Biden their support including former President Barack Obama and former Vice-President Kamala Harris.