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©2013 UpToDate ® Print Email Adenocarcinoma of the colon Adenocarcinoma of the colon may have a variety of appearances on endoscopy. Panel A: a typical exophytic mass; Panel B: a friable polypoid mass; Panel C: circumferential adenocarcinoma. Courtesy of James B McGee, MD. 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. Necrotic adenocarcinoma of the colon Endoscopy showing necrotic colonic lesions that usually suggest an advanced stage of malignancy. Panel A: severe tissue destruction has led to necrosis and bleeding; Panel B: the longstanding tumor has extended deeply into the mucosa and become necrotic. Courtesy of James B McGee, MD.
©2013 UpToDate ® Print Email Adenocarcinoma of the colon Adenocarcinoma of the colon may have a variety of appearances on endoscopy. Panel A: a typical exophytic mass; Panel B: a friable polypoid mass; Panel C: circumferential adenocarcinoma. Courtesy of James B McGee, MD. 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.