Huge Mesenteric Cystic Lymphangioma Presenting with Small Bowel Volvulus in a 3-Year-Old Child

Mesenteric cystic lymphangioma is a rare abdominal mass. Small bowel volvulus caused by mesenteric lymphangioma is exceptional but potentially fatal. We report a case of a 3-year-old boy who complained of recurrent abdominal pain for several months and was admitted to the emergency department for acute abdominal pain with vomiting and bowel obstruction over 24 hours. Clinical examination objectified a peri-umbilical pain. Radiological investigations objectified a small bowel volvulus with individualization of a cystic lesion. Surgical exploration revealed a huge cystic lymphangioma of the mesentery, with a small bowel volvulus over completed common mesentery. The cystic lymphangioma was excised with the 2 supporting bowels, and an ileo-ileal anastomosis was performed. Histological findings confirmed the diagnosis. The child remained asymptomatic at the 6-month follow-up; no recurrence had been noted.