Carcinosarcoma of the corpus uteri is a rare type of cancer that affects the uterus. It is a combination of two types of cancer: carcinoma (cancer of the epithelial cells) and sarcoma (cancer of the connective tissue). This type of cancer is usually found in postmenopausal women and is often aggressive and difficult to treat. Symptoms may include abnormal vaginal bleeding, pelvic pain, and/or a mass in the abdomen. Treatment typically involves surgery, radiation, and/or chemotherapy.