King Charles III, aged 76, has publicly confirmed that he is undergoing treatment for a previously undisclosed form of cancer, which was first announced by Buckingham Palace in February 2024. Wikipedia+3People.com+3Cosmopolitan+3 The diagnosis followed a procedure for an enlarged prostate earlier in January, during which doctors discovered the separate condition. The palace stated the cancer is not prostate cancer. Cosmopolitan+1
Despite his diagnosis, the King has continued to fulfil many of his official duties. A senior royal aide remarked that “as long as you just do what the doctors say… live your life as normal as possible — that’s exactly what he is doing.” People.com In May 2025, during a visit to a cancer-unit hospital, King Charles told a patient that he believed he was “on the better side” of his cancer journey. News.com.au
Although the exact nature of the illness remains private, health disclosures show a kind of management approach: regular treatment, periodic monitoring, and a selective public schedule. Following his diagnosis, the King briefly paused public engagements before resuming duties later in the spring of 2024. People.com+1
Concerns about his health have intensified due to his age and the opacity surrounding the diagnosis. Some reports suggest that while his condition is being managed, it may be “incurable but controlled.” For instance, a Royal Household expert claimed the King is likely to “die with” cancer rather than “of” it. News.com.au+1
In September 2025, during a visit to open a hospital in the West Midlands, King Charles himself acknowledged the physical toll of aging. He told a patient, “I know, this is the terrible thing: as I am discovering already, the bits don’t work so well when you get past 70.” Town & Country
Even so, the King remains on duty. As of July of this year, he travelled to Canada as head of state, opened the 45th Canadian Parliament, and delivered the King’s Speech — marking the first British monarch to do so in person since 1977. El Cierre Digital+1
Buckingham Palace has remained judicious in what it releases. After King Charles was admitted to hospital on 27 March 2025 for “temporary side-effects” from ongoing treatment, the palace emphasized the event was expected, that he was discharged soon afterward, and that the treatment remains “moving in a positive direction.” People.com+1
Within the royal family, awareness of the King’s health has also impacted preparations for the future of the monarchy. Some insiders say succession planning has accelerated, although no abdication is currently planned. Cosmopolitan+1
In a broader public appeal in April 2025, King Charles addressed his own diagnosis in a letter ahead of a Buckingham Palace reception for cancer charities. He spoke of being “among those statistics myself,” and emphasised how illness can bring moments of humanity and compassion. He praised the caregivers, volunteers, and researchers he’s visited over decades. New York Post
To summarise: King Charles is managing a cancer diagnosis, performing many of his royal duties while undergoing treatment, and acknowledging both the realities of aging and the demands of his role. The illness, while serious, is currently described as managed, and although it has forced adjustments (such as hospital stays and truncation of engagements), there is no public indication that he is withdrawing from his role.