Cancer can form in the uterus. But this is not common. There are two types of uterine cancer. These are endometrial cancer and uterine sarcoma. Endometrial cancer can grow from cells lining the uterus. Uterine sarcoma is a rare cancer that grows from cells in the smooth muscle of the uterus. Other tumors can grow in the uterus that are not cancer. One of these is a Uterine fibroid.