Value of CT in the diagnosis and management of gallstone ileus

Figure 1 Ectopic gallstone (arrow) showed totally calcified component (A) and rim-calcified component (B).

Figure 2 Diseased gallbladder (arrow) was replaced by gas (A); mixed air and fluid (B); and fluid with irregular wall (C).

Figure 3 False negative case showed poor differentiation between less calcified rim of the ectopic gallstone (arrow) and the enhanced bowel wall (case 8).

Figure 4 Axial contrast enhanced CT delineated wall thickening (between arrows) of duodenum second portion >1 cm (case 3).

Figure 5 Axial contrast enhanced CT showed rim-calcified ectopic gallstone in the proximal ileum (A). CT section located 3 cm caudal to (A) reveal segmental edematous wall thickening of small intestine (arrow) proximal to transition zone, which indicated transient ischemic change secondary to bowel obstruction (B) (case 2).

Figure 6 Rim-calcified ectopic stone (arrow) sized 2 cm in the long axis with SBO but evacuated spontaneously following conservative treatment (case 9).