“Besides, one former member of the team from [Charles’] Prince of Wales days reveals that the king had actually undergone a cancer scare some years before,” Hardman wrote in a passage of the book, excerpted by the Mail on Sunday.

Battling cancer, King Charles has reportedly been straining to keep up with his royal responsibilities, despite signs that his health may be declining. The 75-year-old monarch rece

King Charles was diagnosed with cancer earlier this year and underwent several months of treatment. A new book has now claimed that the King had a cancer scare years before

King Charles III "is strong" in the face of a "terrifying disease," according to his stepson, Tom Parker Bowles. Queen Camilla's son told People how the monarch, 76 next month, "is doing what he can" after Charles reportedly stopped his cancer treatment to go on a tour of Australia and Samoa.

King Charlesannounced he was diagnosed with cancer earlier this year, but an insider claimed the monarch had a previous brush with it before ascending to the throne. "Cancer is a very scary word if you're a king or anyone else.