Former President Joe Biden has started radiation treatments for an aggressive form of prostate cancer diagnosed in May.

“As part of a treatment plan for prostate cancer, President Biden is currently undergoing radiation therapy and hormone treatment,” a spokesperson for Mr. Biden said. NBC News reported earlier that the radiation treatment is expected to span five weeks.

Mr. Biden also underwent a Mohs surgery to remove cancerous cells from his skin in early September, a spokesperson told NBC News.

When Mr. Biden’s prostate cancer was first announced in May, his spokesperson Kelly Scully said it had metastasized to the bone and was hormone sensitive.

Because his cancer was hormone sensitive, it could have responded to hormone therapy, which involves stopping testosterone from being mad

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