Preoperative clinical characteristics between uterine sarcoma and leiomyoma in patients with uterine mass, a case-control study.

Objectives: To determine the preoperative clinical characteristics associated with uterine sarcoma in patients with uterine mass.

Study Design: We retrospectively reviewed medical records of patients who presented with uterine mass undergoing surgery at Ramathibodi Hospital, with a pathologically confirmed diagnosis, from April 1, 2000 to October 31, 2019. The cases are patients with uterine sarcoma, whereas the controls are patients with leiomyoma diagnosed in the same year, with a proportion of 1 case per 4 controls.