King Charles III returned to public duties on Tuesday, visiting a cancer treatment charity and beginning his carefully managed comeback after the monarch鈥檚 own sidelined him for three months.

The event was the king鈥檚 first formal public engagement since Feb. 6, when that he would be taking a break from public duties to focus on his treatment for an undisclosed type of cancer.

Charles and Queen Camilla met with patients and staff at the University College Hospital Macmillan Cancer Centre in London during their visit.

It was the first of several public appearances Charles is expected to make before a state visit by the emperor and empress of Japan in June.

It is unclear how many of the summer鈥檚 traditional royal events, including the king鈥檚 formal birthday parade and the horse racing at Royal Ascot, Charles will attend as his treatment continues. The palace said last week that doctors were 鈥渧ery encouraged鈥� by the king鈥檚 progress, but as needed to protect his recovery.

For now, Tuesday鈥檚 appearance gave Charles another opportunity to raise awareness of the benefits of early diagnosis and treatment of cancer and other health problems as he has done throughout his illness.

Unlike most royals before him, Charles chose to publicly disclose details about his health when he first underwent treatment for an enlarged prostate and later when he was diagnosed with cancer. The decision raised awareness of these issues.

The National Health Service in England said the number of people seeking advice about prostate problems increased 11-fold in the weeks after Charles鈥� announced he was undergoing treatment.

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