A rare gastrointestinal bleeding due to a cholecystoduodenal fistula: a case report

Abstract Background Gastrointestinal bleeding from cholecystoduodenal fistula is rare. It is usually managed surgically, although a conservative approach is reported in isolated cases. Case presentation A 71-year-old male patient was admitted to the emergency department (ED) presenting melena associated with severe anemia, requiring a blood transfusion. An urgent upper endoscopy showed the intestinal orifice of a cholecystoduodenal fistula. This finding was confirmed by radiological examination and laparoscopy. Cholecystectomy and simultaneous excision of the fistula were successfully performed. As a result, a diagnosis of Mirizzi syndrome type Va was also made. Conclusion A cholecystoduodenal fistula orifice leading to gastrointestinal bleeding is difficult to diagnose without an endoscopic examination of the upper digestive tract. Following this first diagnostic step, a comprehensive patient examination should be conducted, specifically if a history of gallbladder lithiasis has been reported.