A Rare Case of a Retroperitoneal Leiomyoma in the Obturator Fossa

Abstract

Introduction: Uterine leiomyomas are the most common benign solid tumors of the female pelvis. Retroperitoneal myomas are extremely rare and usually malignant with the common location being in the pelvis. Case Presentation: Our case involved a woman who was suering from dysparonia and radiculating right pelvic pain. The pelvic examination revealed a palpable tender mass of about 3-4 cm in size in the right adnexa near the pelvis bone. An orthopedic con- sultation was in favor of the mass being of gynecologic origin. A retroperitoneal approach on the right side revealed a 3 cm mass in the right obturator fossa. Conclusions: The most common place for a myoma is in the uterus. However, other sites have also been presented as case reports. Most smooth muscle tumors originating in the retroperitoneum are malignant. Retroperitoneal sites for myomas are mostly in the pelvis (73.1%). The frequent symptoms of retroperitoneal masses, including myoma, are discomfort, fatigue, weight loss, and radiating pain. The common sonographic findings in these patients is a pelvic solid mass with heterogeneous features. Surgical excision is the main treatment of retroperitoneal smooth muscle tumors.