Abstract
Heterotopic (ectopic) pancreatic tissue refers to tissue located outside the borders of the main pancreas. It is rarely found in gallbladders and can cause biliary disease, with only a few documented cases in the surgical literature. Here, we present the unusual case of a 21-year-old female with acute on chronic cholecystitis caused by obstruction of the cystic duct with ectopic pancreatic tissue. The aim of the paper is to describe the significance of ectopic pancreatic tissue in biliary pathology and bring awareness to clinicians about this rare entity.