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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Radiol Clin North Am. 2013 Jan;51(1):69–88. doi: 10.1016/j.rcl.2012.09.005

FIGURE 2. Tagged stool mimicking a flat polyp on 3D.

FIGURE 2

FIGURE 2

FIGURE 2

3D endoluminal CTC image (A) shows an elongated flat lesion on a colonic fold. However, both 3D with translucency rendering (B) and coronal 2D correlation (C) show dense internal contrast tagging, excluding a flat polyp. Care must be taken in such cases to ensure a true flat soft tissue polyp does not lie deep to the contrast.