President Biden is receiving radiation therapy as he battles an aggressive form of prostate cancer, a spokesperson told The Hill on Saturday. 

“As part of a treatment plan for prostate cancer, President Biden is currently undergoing radiation therapy and hormone treatment,” the spokesperson said.

A source familiar told NBC News that the former president’s treatment will span five weeks.

Biden, 82, was diagnosed with cancer in May. A spokesperson at the time said the disease was “characterized by a Gleason score of 9 (Grade Group 5) with metastasis to the bone” and appeared “hormone-sensitive,” allowing for management. 

Last month, he underwent a procedure to remove skin cancer from his forehead. A spokesperson told The Hill that Biden had a Mohs surgery to remove signs of cancer, which left a scar on his forehead.

After his initial diagnosis this spring, Biden took to social media to express gratitude for the outpouring of support following his announcement. 

“Cancer touches us all. Like so many of you, Jill and I have learned that we are strongest in the broken places,” Biden wrote on social platform X, sharing a photo of him, former first lady Jill Biden and their cat, Willow.

Political foes who have long been critical of his health and Biden’s allies alike spoke out in support of the former president after his diagnosis, including President Trump.

“Melania and I are saddened to hear about Joe Biden’s recent medical diagnosis,” Trump wrote on social media in May. “We extend our warmest and best wishes to Jill and the family, and we wish Joe a fast and successful recovery.”

Since leaving the White House in January, Biden has largely stepped back from the spotlight after decades in public office. But the diagnosis did raise questions about whether warning signs could have been caught earlier.