An abdominal-pelvic huge space-occupying lesion in a male

We herein report a rare case of mesenteric leiomyoma which is remarkable for its huge size in a male individual and cystic degeneration. A 22-year-old man presented with abdominal distention for 3 months. Systematic physical examination revealed abdominal bulge and soft abdomen. Laboratory examination indicated nothing but a slight increase of CA125. Abdominal computed tomography demonstrated a multilobulated well-defined giant lesion (measuring 33 × 30 × 19 cm) in the abdominal-pelvic cavity, which consisted of mixed solid and cystic parts. The patient underwent exploratory laparotomy. Intraoperatively, the giant mass was found originating from the mesentery, weighting 12 kg. Pathological analysis confirmed the diagnosis of mesenteric leiomyoma.