Former President Joe Biden is undergoing radiation therapy and hormone treatment as part of a treatment plan for prostate cancer, a spokesperson told CBS News.

A person close to Biden tells CBS News the former president is doing well and responding to treatment. Another person familiar with Biden's treatment said it began "a few weeks ago and it continues." He is being treated in Philadelphia.

Biden was diagnosed with an "aggressive form" of prostate cancer in May 2025. According to a statement from his office at the time, the former president was diagnosed with "prostate cancer, characterized by a Gleason score of 9 (Grade Group 5) with metastasis to the bone" after a small nodule was found in the prostate.

Gleason scores are a grading system, and the lower the grade, the more ca

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