[Mesenteric cyst is a rare origin for abdominal pain in children].

A ten-year-old boy with known episodes of moderate abdominal pain during 18 months suddenly developed severe abdominal pain, and a CT scan showed a 25 × 15 cm cystic process. The patient was operated and a mesenteric cyst was removed along with 15 cm of small bowel. Post-operative course was uneventful. Mesenteric cysts are rare, but should be considered as an origin for abdominal pain in children, particularly after exclusion of more common diagnoses.