Location of Adenomas Missed by Optical Colonoscopy

Figure 4. Three-dimensional endoluminal view from virtual colonoscopy that simulates retroflexed view of rectal ampulla shows
a subtle flat lesion ( ) that measured 7 cm from the anal verge. Note the tip of small rectal catheter ( ) that was used for
air insufflation. Two-dimensional axial computed tomography image with soft tissue windowing confirms the presence of a flat
rectal lesion ( ).
Unblinded 7-mm tubular adenoma located in the distal rectum.Left.arrowarrowheadRight.arrow
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Ann Intern Med
September 7, 2004
vol. 141
no. 5
352-359