Beyond the Bowel: A Rare Left Hepatic Duct–duodenal Fistula Following Foreign Body Ingestion

Abstract

Fistula formation between the biliary system and the gastrointestinal tract is uncommon. There are various types of biliary-enteric fistulas, such as cholecystoduodenal, choledochoduodenal, and cholecystocolonic fistulas, with the most common being cholecystoduodenal. Most of these fistulas result from gallstone disease, but they can also be caused by peptic ulcer disease, neoplasms, or iatrogenic injuries during surgery. Our case report discusses a rare instance of a bilio-digestive fistula between the left hepatic duct and duodenum that developed after foreign body ingestion. This case highlights the importance of an active search and appropriate workup of a fistula, especially after foreign body ingestion. We will explore and describe this case's diagnosis, clinical course and treatment.