Kate Middleton was diagnosed with cancer in early 2024 following major abdominal surgery. The specific type of cancer has not been publicly disclosed by Buckingham Palace. The diagnosis came as a shock after initial tests indicated a noncancerous condition during surgery, but subsequent tests revealed cancer was present. She underwent preventive chemotherapy and was reported to be in remission by September 2024. The exact nature of the cancer remains private, with speculation around abdominal organs but no official confirmation.