Spontaneous Parasitic Leiomyoma—Two Case Reports—

Abstract

A parasitic leiomyoma is an ectopic leiomyoma that is completely detached from the uterus. In a few cases, a parasitic leiomyoma originates from a pedunculated subserous myoma that is detached from the uterus at the peduncle after it acquires feeding vessels by adhering to the surrounding organs, the peritoneum, or the abdominal wall. It can also develop in the abdominal cavity after spontaneous shedding from or iatrogenic engraftment following seeding of a uterine myoma. We report 2 rare cases of spontaneously developing parasitic leiomyomas.

Case 1 : A mobile pelvic mass was detected intraoperatively in a 46-year-old woman underwent surgery for a missed abortion. The tumorous lesion showed feeding vessels from the omentum and was laparoscopically excised.

Case 2 : A 78-year-old woman with suspected strangulated ileus was referred to our hospital for emergency treatment. A tumorous lesion with severe calcification adherent to the small intestinal wall was identified, and emergency surgery was performed for strangulated ileus caused by the mass. A parasitic leiomyoma should be considered in the differential diagnosis in women presenting with intraperitoneal masses, particularly in those with uterine myomas or those with a history of uterine myomectomy.