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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

Supine transverse 2D (A and B) and 3D endoluminal (C) CTC images show a large flat soft tissue mass (arrowheads) opposite the ileocecal valve (arrow) that has a somewhat lobulated appearance and results in fold distortion on 3D. Note the contrast coating portions of the lesion on B. This carpet lesion was confirmed at same-day optical colonoscopy (D) and proved to be a tubulovillous adenoma. Most non-flat lesions of this large size would be malignant.

Supine transverse 2D (A and B) and 3D endoluminal (C) CTC images show a large flat soft tissue mass (arrowheads) opposite the ileocecal valve (arrow) that has a somewhat lobulated appearance and results in fold distortion on 3D. Note the contrast coating portions of the lesion on B. This carpet lesion was confirmed at same-day optical colonoscopy (D) and proved to be a tubulovillous adenoma. Most non-flat lesions of this large size would be malignant.