| A rare malignant mesenchymal tumor of smooth muscle origin characterized histologically by spindle and/or pleomorphic cells, often forming disorganized fascicles, with tumor cell necrosis. Macroscopic characteristics are a large soft usually intramural mass with irregular borders and necrotic and hemorrhagic areas located in the uterus. Presenting signs and symptoms typically include dysfunctional vaginal bleeding, vaginal discharge, palpable pelvic mass and/or pelvic pain/pressure. Changes in bowel habits, frequent or painful urination and hematuria may also be associated. |