Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1477-7819-9-148/MediaObjects/12957_2011_Article_896_Fig1_HTML.jpg)
Colonoscopic view of the circumferential rectal wall thickening located 7 cm above the dentate line and showing an edematous, erythematous, and nodular mucosa.
Colonoscopic view of the circumferential rectal wall thickening located 7 cm above the dentate line and showing an edematous, erythematous, and nodular mucosa.