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Ulcerative colitis

Ulcerative colitis
Endoscopic appearance of ulcerative colitis. Extensive ulceration of the mucosa is the most common endoscopic finding (panel A). The surface is irregular, friable, and erythematous, with loss of the normal vascular markings. Pseudopolyps may form as a reaction to inflammation (panel B); these can become quite extensive (panel C).
Courtesy of James B McGee, MD.
Graphic 81755 Version 2.0
Normal sigmoid colon
Endoscopic appearance of the normal sigmoid colonic mucosa. The fine vasculature is easily visible, and the surface is shiny and smooth. The folds are of normal thickness.
Courtesy of James B McGee, MD.
Graphic 55563 Version 1.0

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