Left Hepatic Lobe Agenesis With Ectopic Gallbladder.

An ectopically located gallbladder is a rare entity. Here, we present a case of an ectopic gallbladder with left hepatic lobe agenesis. In this study, we describe the case of a 56-year-old male who was a known diabetic patient. He presented with abdominal pain, which started two weeks prior. Computed tomography (CT) abdomen with contrast was advised by the primary team, which showed an incidental ectopic gallbladder along the right posterior-inferior margins of the liver. Associated with it, there was complete agenesis of the left hepatic lobe, including absent segments II, III, and IV. Most of the commonly encountered ectopic positions include intrahepatic, transverse, retrohepatic, retroperitoneal, suprahepatic, falciform ligament, or under the left liver lobe. Ectopic gallbladders have clinical significance as they alter the clinical presentation of cholecystitis. They create technical challenges during cholecystectomy and other biliary operations and cause misdiagnosis in imaging. A thorough inspection of the biliary tract in patients undergoing surgery is suggested before electrocoagulation. A radiologist must always inform the clinician about the existence of an aberrant gallbladder.