Cholecystoduodenal Fistula: A Case Series of an Unusual Complication of Gallstone Diseases.

The usual complications of gallstone diseases are acute cholecystitis, choledocholithiasis, cholangitis, and acute pancreatitis. Most of the patients who present with these complications have a prior history suggestive of gallstone diseases. Cholecystoenteric fistula is a very uncommon complication of gallstone disease, and many patients do not have a previous history suggestive of biliary pathology. Gallstone ileus is a mechanical cause of intestinal obstruction due to the passage of a large stone through the cholecystoenteric fistula. These patients present with vague clinical signs and symptoms and non-specific laboratory abnormalities; hence, a high index of suspicion is needed for early diagnosis and management of the same. Once diagnosed, controversies exist in their appropriate surgical management. We present a series of four cases of cholecystoduodenal fistula, two patients presenting with gallstone ileus, and two patients presenting with cholangitis and their successful surgical management.