Cholecystocolonic fistula complicated by gallstone impaction and perforation of the sigmoid

An 88-year-old woman was referred to our department because of sudden onset of progressively increasing lower abdominal pain and clear inflammatory laboratory tests. Her medical record revealed she had suffered from an acute calculous cholecystitis two years earlier, conservatively treated with percutaneous drainage followed by antibiotic therapy (Fig. A). The recovery had been long and exhaustive to this elderly patient.