Atlas of Gastrointestinal Imaging Figure 1.1.4 Flat adenomas

Dr. Perry Pickhardt
Aug 26, 2007
FIGURE 1.1.4 Flat adenomas 3D endoluminal CTC image (A) and 2D CTC image with soft tissue windowing (B) show a slightly raised, flat 7-mm tubular adenoma (arrowheads) adjacent to the rectal catheter. 3D endoluminal CTC image (C) and corresponding colonoscopy image (D) from a second patient show a similar-appearing 6-mm, flat tubular adenoma (C, arrowheads) in the sigmoid colon. 3D endoluminal CTC (E) and corresponding colonoscopy (F) images from a third patient show a 3.5-cm tubulovillous adenoma with a broad elongated appearance. This lesion could be classified as flat or sessile, depending on the specific definition used. (A and B from Pickhardt PJ, Nugent PA, Mysliwiec PA, et al: Location of adenomas missed at optical colonoscopy. Ann Intern Med 2004; 141:352-359; C and D from Pickhardt PJ, Nugent PA, Choi JR, Schindler WR: Flat colorectal lesions in asymptomatic adults: Implications for screening with CT virtual colonoscopy. AJR 2004; 183:1343-1347.)
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