Duodenal Duplication Cyst having Ectopic Gastric and Pancreatic Tissues

A 1-year-old female child presented with distention of abdomen, accompanied with occasional episodes of vomiting and abdominal pain for the past eight months with no history of constipation or fever. The child was vitally stable. On inspection upper abdomen was found distended and mild tenderness in epigastrium on deep palpation. Laboratory investigations were within normal limits. The plain radiograph of abdomen was unremarkable. Ultrasound scan showed a 6.9 cm x 7.5 cm sized cystic area with internal debris at porta hepatis, compressing the liver. CT scan showed a 5 cm x 7 cm sized cyst extending from porta hepatis to the duodenum (Fig. 1). The preoperative differentials were duodenal duplication and choledochal cyst.