Peritoneal Leiomyoma in a Male Patient: A Case Report.

Leiomyomas are smooth muscle tumors that are commonly present in premenopausal women. These tumors are benign and of monoclonal origin. Peritoneal cavity leiomyomas are commonly reported in females and rarely reported in males. Here, we present a 58-year-old male who presented to the emergency room with abdominal pain. Computed tomography (CT) scan of the abdomen revealed multiple well-circumscribed left lower quadrant mesenteric masses containing heterogeneous attenuation and macroscopic fat. Exploratory laparotomy performed following abdominal CT and subsequent CT-guided biopsy revealed two intra-abdominal masses. Histopathological evaluation was positive for desmin and caldesmon immunohistochemical stains, and negative for C-kit, consistent with benign leiomyomata. This case highlights a benign leiomyoma within the abdominal cavity, which is an extremely rare occurrence and a potentially rare cause of abdominal pain.