A 19-year-old male presented with abdominal distenion and constipation for 3 days and vomiting for one day. here was no similar history in the past. There were no ther co-morbidities. On examination, patient had abdomial distension. Routine lab investigations were within normal imits. Barium meal showed the duodeno-jejunal (DJ) flexure n the right side of abdomen and clustered proximal jejunal
