Adenosarcoma of the corpus uteri is a rare subtype of mixed epithelial-mesenchymal tumor, often presenting as a large, exophytic polypoid lesion, which may extend through the cervix, composed of benign or atypical epithelium and low-grade malignant stroma. It usually presents with dysfunctional bleeding or vaginal discharge and less often abdominal pain. Association with long-term unopposed estrogen therapy, tamoxifen therapy and a history of pelvic radiation has been reported.