Princess Kate's cancer: Adjuvant chemotherapy – what exactly is it?. After her abdominal surgery, tests indicated cancer, Princess Catherine explained in her video message.

On the advice of the doctors, the 42-year-old is now receiving chemotherapy as a precaution. Chemotherapy is a drug therapy against cancer. So-called adjuvant chemotherapy usually follows the removal of a tumor. It is given to destroy cancer cells that may still be present in the body. This is intended to reduce the risk of a possible relapse.