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Fig. 2. —CT scan obtained in 67-year-old man with appendicitis. Although cecum (long arrow) is well opacified, there is no intraperitoneal fat to aid in visualization of appendix. Note also suboptimal small-bowel opacification (short arrow) in right lower quadrant, contributing to difficulty in diagnosis. Diagnosis of appendicitis was confirmed at surgery although not diagnosed on either preoperative or even retrospective evaluation of CT scan.