King Charles III has cancer: The three most common forms of cancer in men as they age. As they age, men often develop the following three types of cancer: Prostate cancer, colon cancer and lung cancer.

The older you are, the higher your risk of developing colon cancer. On average, men develop colon cancer at the age of 72, which is a malignant change in the mucous membrane of the intestine. A tumor most often occurs in the large intestine and rectum. The cancer risk for certain types of tumors changes over the course of life.