Magnifying image-enhanced endoscopy for collagenous colitis

Abstract Background and study aims We report a case series of 5 patients with collagenous colitis (CC) presenting with chronic watery diarrhea, who were subjected to magnifying, chromoendoscopy and narrow band imaging (NBI). Magnifying chromoendoscopy revealed whitish-clouded, honeycomb-like appearance at orifices of the crypts. NBI with high magnification revealed irregular caliber variation of the subepithelial capillary network. Presence of these features corresponded with histological characteristics of CC indicated by thickening of the subepithelial collagen layer. We concluded that magnifying image-enhanced endoscopy is a reliable tool to diagnose CC.

Download Full-text

Sa1601 Cancer Risk Assessment System of Vascular and Surface Patterns in Gastric Lesions for Computer-Aided Pathology Prediction With High-Magnification Endoscopy (HME) and Narrow-Band Imaging (NBI)

Gastrointestinal Endoscopy ◽

10.1016/j.gie.2013.03.652 ◽

2013 ◽

Vol 77 (5) ◽

pp. AB264

Author(s):

Sergey V. Kashin ◽

Roman O. Kuvaev ◽

Alexander S. Nadezhin ◽

Herbert Edelsbrunner ◽

Viktor Kapranov ◽

...

Keyword(s):

Risk Assessment ◽

Narrow Band ◽

Narrow Band Imaging ◽

Assessment System ◽

Cancer Risk Assessment ◽

High Magnification ◽

Gastric Lesions ◽

Magnification Endoscopy ◽

Computer Aided ◽

Surface Patterns

Download Full-text

Su1469 Does Magnifying Narrow Band Imaging or Magnifying Chromoendoscopy Help Endoscopist to Assess the Depth of Invasion in Large Sessile and Flat Polyps: Prospective Study

Gastrointestinal Endoscopy ◽

10.1016/j.gie.2012.03.894 ◽

2012 ◽

Vol 75 (4) ◽

pp. AB343

Author(s):

Hui Won Jang ◽

Sung Pil Hong ◽

Soo Jung Park ◽

Jae Hee Cheon ◽

Tae IL Kim ◽

...

Keyword(s):

Prospective Study ◽

Narrow Band ◽

Narrow Band Imaging ◽

Depth Of Invasion ◽

Magnifying Chromoendoscopy

Download Full-text

Diagnostic limitations of magnifying endoscopy with narrow-band imaging in early gastric cancer

Endoscopy International Open ◽

10.1055/a-1220-6389 ◽

2020 ◽

Vol 08 (10) ◽

pp. E1233-E1242

Author(s):

Kohei Matsumoto ◽

Hiroya Ueyama ◽

Takashi Yao ◽

Daiki Abe ◽

Shotaro Oki ◽

...

Keyword(s):

Gastric Cancer ◽

Early Gastric Cancer ◽

Gastric Adenocarcinoma ◽

Narrow Band ◽

Narrow Band Imaging ◽

Magnifying Endoscopy ◽

Clinicopathological Features ◽

Fundic Gland ◽

Undifferentiated Adenocarcinoma ◽

Histological Characteristics

Abstract Background and study aims Magnifying endoscopy with narrow band imaging (M-NBI) has made a huge contribution to endoscopic diagnosis of early gastric cancer (EGC). However, we sometimes encountered false-negative cases with M-NBI diagnosis (i. e., M-NBI diagnostic limitation lesion: M-NBI-DLL). However, clinicopathological features of M-NBI-DLLs have not been well elucidated. We aimed to clarify the clinicopathological features and histological reasons of M-NBI-DLLs. Patients and methods In this single-center retrospective study, M-NBI-DLLs were extracted from 456 EGCs resected endoscopically at our hospital. We defined histological types of M-NBI-DLLs and analyzed clinicopathologically to clarify histological reasons of M-NBI-DLLs. Results Of 456 EGCs, 48 lesions (10.5 %) of M-NBI-DLLs were enrolled. M-NBI-DLLs was classified into four histological types as follows: gastric adenocarcinoma of fundic-gland type (GA-FG, n = 25), gastric adenocarcinoma of fundic-gland mucosal type (GA-FGM, n = 1), differentiated adenocarcinoma (n = 14), and undifferentiated adenocarcinoma (n = 8). Thirty-nine lesions of M-NBI-DLLs were H. pylori-negative gastric cancers (39/47, 82.9 %). Histological reasons for M-NBI-DLLs were as follows: 1) completely covered with non-neoplastic mucosa (25/25 GA-FG, 8/8 undifferentiated adenocarcinoma); 2) well-differentiated adenocarcinoma with low-grade atypia (1/1 GA-FGM, 14/14 differentiated adenocarcinoma); 3) similarity of surface structure (10/14 differentiated adenocarcinoma); and 4) partially covered and/or mixed with a non-neoplastic mucosa (1/1 GA-FGM, 6/14 differentiated adenocarcinoma). Conclusions Diagnostic limitations of M-NBI depend on four distinct histological characteristics. For accurate diagnosis of M-NBI-DLLs, it may be necessary to fully understand endoscopic features of these lesions using white light imaging and M-NBI based on these histological characteristics and to take a precise biopsy.

Download Full-text