The uterus lies between the bladder and rectum. The inner wall of the uterus is the endometrium. and cancer in this layer Untreated endometrial cancer spreads and causes various problems in the pelvic area. including intestinal and urinary tract disorders If the spread continues Along with enlarged lymph nodes, abdominal, and liver, lung, and bone disease, more than 30,000 new cases of cancer are diagnosed each year in the United States.