Novel Endoscopic Procedures for the Diagnosis of Colorectal Lesions―Narrow Band Imaging Colonoscopy Takayuki Matsumoto 1 , Tetsuji Kudo 1 , Motohiro Esaki 1 , Shinichiro Yada 1 , Hideki Koga 1 , Shotaro Nakamura 1 , Mitsuo Iida 1 1Department of Medicine and Clinical Science, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan Keyword: 潰瘍性大腸炎 , 大腸内視鏡 , narrow band imaging pp.893-900
Published Date 2008/5/25
DOI https://doi.org/10.11477/mf.1403101380
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 We have been applying narrow-band imaging (NBI) colonoscopy for the assessment of severity in patients with ulcerative colitis (UC). In the active mucosa, NBI colonoscopy depicts friability as a black area. In addition, crypt openings and villous structure become evident during the procedure. In the inactive mucosa, there are two types of mucosal vascular pattern (MVP); one being composed of deep, green vessels and superficial, black vessels, and the other lacking in superficial vessels. When coupled with a magnifying instrument, the active mucosa can be classified into the mucosa with obvious crypt openings and that with villous structure. MVP in the inactive mucosa is depicted as a honey-comb-like structure or an irregular, tortuous structure under magnifying NBI colonoscopy. In our prospective study, a tortuous structure of the mucosa under NBI was highly indicative of dysplastic lesions. Based on these observations, we conclude that NBI magnifying colonoscopy may be of value for the assessment of histologic severity and for cancer surveillance in UC.

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