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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 20. Interpretive pitfalls related to the anorectal, ileocecal valve, and appendiceal regions within the same case.

FIGURE 20

FIGURE 20

FIGURE 20

FIGURE 20

FIGURE 20

FIGURE 20

FIGURE 20

FIGURE 20

The 3D colon map shows three bookmarks (red dots) denoting focal findings in the regions of the anorectum, ileocecal valve, and the appendiceal orifice. Sagittal 2D (B and C) and 3D endoluminal (D) CTC images show an unusual 3–4 cm soft tissue mass extending up from the anorectal region. Note the mass effect upon the lesion from the adjacent balloon on the rectal catheter. The mass was confirmed at OC (E) but endoscopic biopsies were inconclusive. After transanal excision, a hemorrhoid with organizing thrombosis was confirmed. Focal abnormalities (arrows) were also noted at the ileocecal valve (F and G) and the appendiceal orifice (F and H). At OC, an inflammatory polyp on the ileocecal valve and a small inverted appendiceal stump were confirmed.