Unaccounted Gallbladder.

Gallbladder agenesis is a rare anatomical variant, and most cases are asymptomatic and diagnosed on autopsy. Few of them may present with features suggestive of biliary tract pathology. A 32-year-old male presented with complaints of intermittent epigastric pain for three months. Abdominal ultrasonography was suggestive of chronic calculous cholecystitis, and he was planned for laparoscopic cholecystectomy. However, no gallbladder was found during the surgery. Postoperative evaluation was suggestive of an absent gallbladder with a normal ductal system. A provisional diagnosis of sphincter of Oddi dysfunction was made based on his symptoms. Congenital absence of gallbladder is a rare anomaly and only a few of the affected individuals are symptomatic. Lack of specific features, coupled with the inability of standard abdominal ultrasonography to detect the absence of gallbladder, can put the treating surgeon in a dilemma intraoperatively. Agenesis of the gallbladder is often missed and this entity should be kept in mind while having difficulty in visualizing the gallbladder. An astute surgeon should be wary of this diagnosis during difficult dissection to avoid bile duct injuries.