Retroperitoneal recurrence of uterine smooth muscle tumor of uncertain malignant potential as leiomyosarcoma

Abstract

A 57-year-old Korean woman visited 37 months after initial surgery with fetal head sized pelvic mass. Initially, she underwent total abdominal hysterectomy with bilateral salpingo-oophorectomy, omentectomy, and para-aortic lymph node biopsy. The initial pathological report showed uterine smooth muscle tumors of uncertain malignant potential (STUMP). She had not received adjuvant therapy. Transvaginal ultrasound revealed multiple solid masses in the pelvic cavity. Abdomino-pelvic computed tomography scan revealed heterogeneous lobulated rounding masses. Tumor markers were all within the normal range. She underwent explorative laparotomy. The pathological diagnosis was epitheloid leiomyosarcoma. Patients with STUMP should be counseled regarding the potential for recurrence as leiomyosarcoma, and may require closer surveillance than a yearly.

Retroperitoneal Smooth Muscle Tumor of Uncertain Malignant Potential (STUMP): Case Report

“…Primary retroperitoneal location is rare. A recent case of a secondary location of retro peritoneal uterine STUMP was reported in 2012 in Korea [5]. We report the case of a 44-year-old woman without significant history who was admitted to our unit for an abdominal mass and whose histological examination of surgical specimen came back for a retro peritoneal smooth muscle tumor of uncertain malignant potential (STUMP).…”