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Diagnosis of colorectal tumorous lesions by magnifying endoscopy.

Abstract：

BACKGROUND:The magnifying colonoscope allows 100-fold magnified viewing of the colonic surface. METHODS:We examined 2050 colorectal tumorous lesions by magnifying endoscopy, stereomicroscopy, and histopathology and classified these lesions according to pit pattern. Based on stereomicroscopy, lesions with a type 1 or 2 pit pattern were nontumors, whereas lesions with types 3s, 3L, 4, and/or 5 pit patterns were neoplastic tumors. RESULTS:The pit patterns observed by magnifying endoscopy were fundamentally similar to those demonstrated in stereomicroscopic images. When the diagnosis by magnifying endoscopy was compared with the stereomicroscopic diagnosis, there was agreement in 1130 of 1387 lesions (81.5%). True neoplasms could be differentiated from non-neoplastic lesions. Of lesions with a type 5 pit pattern with a bounded surface, 11 of 22 (50%) were found to be invasive cancers with involvement of the submucosal layer. If this pit pattern is found to involve a relatively broad area of the mucosal surface, extensive malignant invasion (sm-massive) should be strongly suspected. CONCLUSIONS:The magnifying colonoscope provides an accurate instantaneous assessment of the histology of colorectal tumorous lesions. This may help in decision making during colonoscopy.

journal_name

Gastrointest Endosc

journal_title

Gastrointestinal endoscopy

authors

Kudo S,Tamura S,Nakajima T,Yamano H,Kusaka H,Watanabe H

doi

10.1016/s0016-5107(96)70222-5

subject

Has Abstract

pub_date

1996-07-01 00:00:00

pages

8-14

issue

1

eissn

0016-5107

issn

1097-6779

pii

S0016-5107(96)70222-5

journal_volume

44

pub_type

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