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Fig. 2B —Inverted appendiceal stump in 58-year-old asymptomatic woman referred for screening CT colonography (CTC). Transverse 2D image with soft-tissue window settings shows a punctate focus of apparent fat attenuation within polyp head (arrow). Although low-dose technique precluded confident exclusion of an adenomatous polyp based on this finding, possibility of inverted appendiceal stump was suggested.