By disclosing his cancer, Charles breaks centuries of royal tradition. But he shares only so much

FILE - In this Wednesday, April 4, 2018 file photo, Prince Charles declares the games open during the opening ceremony for the 2018 Commonwealth Games at Carrara Stadium on the Gold Coast. The palace’s disclosure that King Charles III has been diagnosed with cancer shattered centuries of British history and tradition in which the secrecy of the monarch’s health has reigned. Following close behind the shock and well wishes for the 75-year-old monarch came widespread surprise that the palace had announced anything at all. (AP Photo/Dita Alangkara, File)

LONDON (AP) — In British history, the secrecy of the monarch's health has always reigned supreme. Buckingham Palace's disclosure that King Charles III has been diagnosed with cancer shattered that longstanding tradition.

On the heels of the shock and well-wishing that followed the official statement Monday came the surprise that the palace had announced anything at all. Indeed, was sparse on details: Charles, 75, had begun treatment for a cancer it did not name after being diagnosed during a recent . The king is stepping back from public duties but carrying on state business during his treatment, which he'll receive as an outpatient, the palace said.

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