Kate Middleton, Princess of Wales, on Friday revealed that she has cancer and is undergoing chemotherapy. Her condition was disclosed in a video message recorded on Wednesday and broadcast Friday, coming after weeks of speculation on social media about her whereabouts and health since she was hospitalized in January for unspecified abdominal surgery.Kate Middleton, Princess of Wales, on Friday revealed that she has cancer and is undergoing chemotherapy. Her condition was disclosed in a video message recorded on Wednesday and broadcast Friday, coming after weeks of speculation on social media about her whereabouts and health since she was hospitalized in January for unspecified abdominal surgery.