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Fig. 3A. —75-year-old man with known diverticulosis and recurrent left lower quadrant pain. Small (3-mm) polypoid lesion in ascending colon located on haustral fold is seen on high-resolution video colonoscopy (A) and ultra-low-dose MDCT colonography (B). MDCT colonography showed multiple diverticula of sigmoid colon without sign of acute inflammation (not shown).