[Acute abdominal pain with surprising etiology-rare complication of a common disease].

The development of a cholecystocolic fistula as a complication of chronic cholecystitis and/or cholangitis is very rare and is difficult to detect without modern imaging. Nevertheless, acute abdominal symptoms are a frequent cause of patient presentation to an emergency department. The present case demonstrates that chronic cholecystitis with corresponding complications can present even without cholestasis and infection.