Pancreatic hydatid cyst masquerading as a choledochal cyst

A 6-year-old boy presented with repeated attacks of fever, abdominal pain, and obstructive jaundice. Clinical examination and preoperative imaging suggested the diagnosis of a type I choledochal cyst. During surgery, a hydatid cyst was found occupying the head of pancreas, causing obstruction of the common bile duct. The authors emphasize that in endemic areas, hydatid cyst should be included in the list of conditions in the differential diagnoses of obstructive jaundice and cystic lesions located around the bilio-pancreatic junction in children.