Figure 1.

Abdominal computed tomography (CT) of the patients. A: axial abdominal CT showed pneumobilia inside liver (yellow arrows); B: distended small bowel loops and air-fluid level within the intestine were revealed (asterisks); C: coronal CT image showed distended small bowel loops secondary to a calcified mass (red arrow) in the ileum, which indicated the gallstone ileus.

Figure 2.

Intraoperative view of the surgery. A: gallstone ileus (red arrow) with distended small bowel loops; B: a 4 cm×2.5 cm gallstone was removed through the laparotomy.