ing Charles III, the reigning monarch of the United Kingdom, was diagnosed with a “form of cancer,” the royal family said Monday, one week after he was released from the hospital for a prostate procedure and less than a year after his coronation in May 2023.

The 75-year-old British monarch was diagnosed after a brief hospitalization in January for a benign prostate enlargement uncovered a “separate issue of concern.”

Buckingham Palace did not specify what type or stage of cancer the king has.

Charles began cancer treatments on Monday, the royal family said in a press release, and was advised by doctors to step away from his public-facing duties in the monarchy.

However, the royals did say Charles will “continue to undertake State business and official paperwork as usual” during his treatment, and will return to “full public duty” as soon as possible.