Narrow-Band Imaging Colonoscopy to Assess Mucosal Angiogenesis in Ulcerative Colitis

Figure 1

Endoscopic and histological findings of the mucosa classified as “clear pattern” under NBI. (a) Under NBI colonoscopy, the brownish intramucosal capillaries were clearly shown. (b) The histological degree of inflammation was judged to be mild. (c) Sporadic microvessels in the lamina propria and submucosa were revealed by immunohistological staining with endothelium marker CD31. (d) VEGF staining was predominantly localized in endothelial cells of vessel and in epithelial cells.

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