Various clinical presentations from chronic abdominal pain to acute midgut volvulus with ischaemic bowel injury may result from failure of normal intestinal rotation and fixation. A patient having malrotation and internal herniation of gut clinically presented to us with intermittent abdominal pain, bilious vomiting and abdominal mass mimicking mesenteric cyst. This is a very rare and exceptional form of presentation of malrotation of gut. Rarity of the clinical presentation leads us to report this case.