Y-Shaped Vesica Fellea Duplex Gallbladder Causing Acute Biliary Pancreatitis.

Gallbladder duplication refers to the splitting of "gallbladder primordium" during the early embryonic development in the fifth or early sixth week. Although it is a very rare congenital abnormality and most of the patients will be asymptomatic, yet the symptomatic cases present with abdominal complaints like nausea vomiting, abdominal pain leads to cholecystitis, cholangitis, biliary colic, or pancreatitis. Herein, we present a case report of duplication of the gallbladder, which was difficult to diagnose on radiology. We report a case of a 35-year-old female who was admitted with acute gallstone pancreatitis. The diagnosis was made by magnetic resonance cholangiopancreatography (MRCP) and blood tests. She underwent an inpatient endoscopic retrograde cholangiopancreatography (ERCP) which cleared the bile duct and confirmed the diagnosis of the duplex gallbladder. The patient was then discharged home and an outpatient cholecystectomy is being planned.The duplex gallbladder may possibly be associated with other anomalies of the bile duct system. Biliary pancreatitis has been associated with such abnormality. Accurate diagnosis is crucial to achieving due to the possibility that gallbladder can be missed in imaging testing. Cholecystectomy required extreme care because these anomalies can lead to critical injuries of the bile duct and vascular system.