The Japan Narrow-Band Imaging Expert Team (JNET) Classification for the Characterization of Colorectal Lesion Using Magnifying Endoscopy

2020 ◽  
pp. 75-80
Author(s):  
Yasushi Sano ◽  
Shinji Tanaka ◽  
Yutaka Saito
Keyword(s):  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy ◽  
Expert Team

scholarly journals Diagnostic ability of Japan Narrow-Band Imaging Expert Team classification for colorectal lesions by magnifying endoscopy with blue laser imaging versus narrow-band imaging

2021 ◽  
Vol 09 (02) ◽  
pp. E271-E277
Author(s):  
Renma Ito ◽  
Hiroaki Ikematsu ◽  
Tatsuro Murano ◽  
Kensuke Shinmura ◽  
Motohiro Kojima ◽  
...  
Keyword(s):  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy ◽  
Blue Laser ◽  
Laser Imaging ◽  
Diagnostic Ability ◽  
Blue Laser Imaging ◽  
Expert Team ◽  
Type 3

Abstract Background and study aims The Japan Narrow-band imaging (NBI) Expert Team (JNET) classification was proposed for evaluating colorectal lesions. However, it remains unknown whether the JNET classification can be applied to magnifying endoscopy with image-enhanced endoscopies other than NBI. This study aimed to compare the diagnostic ability of JNET classification by magnifying endoscopy with blue laser imaging (ME-BLI) and with ME-NBI. Patients and methods We retrospectively assessed consecutive patients diagnosed per the JNET classification by ME-BLI (BLI group) or ME-NBI (NBI group) between March 2014 and June 2017. We compared the diagnostic value of JNET classification between the groups with one-to-one propensity score matching. Results Four hundred and seventy-one propensity score-matched pairs of lesions were analyzed. In the BLI and NBI groups, the overall diagnostic accuracies were 92.1 % and 91.7 %, respectively, and those for differentiating between neoplastic and non-neoplastic polyps were 96.6 % and 96.8 %, respectively. The positive predictive value by each JNET classification in BLI vs. NBI group was 90.6 % vs. 96.2 % in Type 1, 94.3 % vs. 94.6 % in Type 2A, 57.7 % vs. 42.3 % in Type 2B, and 100 % vs. 91.7 % in Type 3. The negative predictive value was 97.0 % vs. 96.9 % in Type 1, 88.1 % vs. 82.8 % in Type 2A, 98.0 % vs. 98.2 % in Type 2B, and 98.5 % vs. 98.7 % in Type 3. No statistical difference in the diagnostic results was found between the groups. Conclusions The diagnostic ability of the JNET classification by ME-BLI and ME-NBI was comparable, with the former also applicable for diagnosis of colorectal lesions.

scholarly journals Utility of Japan Narrow Band Imaging Expert Team Classification Using Narrow Band Imaging for Evaluation of Colonic Polyps

2020 ◽  
Vol 11 (02) ◽  
pp. 138-145
Author(s):  
Dipak S. Ahire ◽  
Pravin M. Rathi ◽  
Niranjan H. Banka ◽  
Parth K. Shah
Keyword(s):  
Predictive Value ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Colonic Polyps ◽  
Current Evidence ◽  
Low Grade ◽  
Expert Team ◽  
Type 3

Abstract Background Narrow band imaging (NBI) is an advanced endoscopic imaging technique that enhances visualization of the mucosal surface and is used as a screening tool for colonic polyps. Its usefulness is currently explored to a lesser extent in India. So, we assessed the utility of Japan NBI Expert Team (JNET) classification for characterization of colorectal polyps. Methods A prospective observational study was performed from January 2018 to June 2019 of patients undergoing colonoscopy at a tertiary care hospital. NBI image of polyps was captured followed by either polypectomy/biopsy. Histopathology results were correlated with the pattern revealed by NBI on polyps using the JNET classification. Results A total of 80 patients, 61(76.25%) male with a mean (standard deviation [SD]) age of 58.41 ± 14.59 years were included. Out of the 90 lesions, 23 (25.5%) had type-1 pattern, 45 (50%) had 2A, 13 (14.4%) had 2B, and 9 (10%) had type-3 pattern. On histopathology, majority 51 (59.3%) were found to be adenomatous with low-grade intramucosal neoplasia. When correlating our results with JNET category type 1 and hyperplastic polyps, the sensitivity was 90%, specificity was 97%, negative predictive value was 97%, positive predictive value was 90%, and diagnostic accuracy was 96%. Correlating type 2A and low-grade intramucosal neoplasia had results of 78, 87, 76, 90, and 82%, respectively. Correlating type 2B and high-grade intramucosal neoplasia had results of 83, 90, 99, 38, and 90%, respectively. Correlating type 3 and deep submucosal cancer had results of 88, 98, 99, 78, and 97%, respectively. Conclusion NBI shows excellent probability to exclude carcinoma possibilities based on the changes in colonic mucosal features. Owing to slightly lower sensitivity for type 2B, it needs additional investigation using pit pattern diagnosis. We demonstrated the high-diagnostic performance of NBI in making an accurate diagnosis of early colorectal cancers in colonoscopy. Further refinement in the NBI technology might add to the current evidence for characterization of polyps.

Acetic acid spray enhances accuracy of narrow-band imaging magnifying endoscopy for endoscopic tissue characterization of early gastric cancer

2014 ◽  
Vol 79 (5) ◽  
pp. 712 ◽  
Author(s):  
Nikolas Eleftheriadis ◽  
Haruhiro Inoue ◽  
Haruo Ikeda ◽  
Manabu Onimaru ◽  
Akira Yoshida ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Acetic Acid ◽  
Early Gastric Cancer ◽  
Tissue Characterization ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy

Endoscopic submucosal dissection by using Clutch cutter and IT knife 2 for early gastric cancer with severe submucosal fibrosis: a case report

MedPharmRes ◽  
2018 ◽  
Vol 2 (3) ◽  
pp. 17-21
Author(s):  
Nhan Le ◽  
Phuong Vien ◽  
Nghia Le
Keyword(s):  
Gastric Cancer ◽  
Early Gastric Cancer ◽  
Endoscopic Submucosal Dissection ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy ◽  
Gastrointestinal Cancers ◽  
Pathological Result ◽  
Well Differentiated ◽  
Submucosal Fibrosis

Introduction: Gastric cancer is one of the highly malignant gastrointestinal cancers and the third leading cause of cancer death. In the last decade, early gastric cancer (EGC) has been reported by using narrow-band imaging (NBI) magnifying endoscopy. Advances in endoscopic techniques, such as endoscopic submucosal dissection (ESD), have enabled the en bloc resection of these EGC. Although ESD is performed for early gastric cancer, there are still many difficult problems in technique of this procedure. The difficulty of gastric ESD depends on the size and location of a tumor, presence of severe submucosal fibrosis, presence of ulceration... We report a case of our successful ESD by using Clutch cutter and IT knife 2 in treatment of EGC with severe submucosal fibrosis. Case presentation: A 62-year-old man felt an epigastric discomfort two months ago. The narrow-band imaging (NBI) magnifying endoscopy revealed a suspected early gastric cancer type 0 - IIa + IIc (Japanese classification of early gastrointestinal cancers) at the incisura angularis, the size of this lesion was 15 mm in diameter, and pathological result of endoscopic biopsy was a well-differentiated adenocarcinoma. ESD was performed and we found there was severe submucosal fibrosis which was dissected safer and faster by using Clutch cutter and IT knife 2. There were no complications such as severe bleeding and perforation. The size of resected specimen was 60 x 35 mm and the time of procedure was 150 minutes. After ESD, the pathological result was a well differentiated adenocarcinoma, pT1a, UL(-), LY(-), V(-), no cancer cell in vertical and horizontal margins. The healing time of ESD-induced ulcer was 5 weeks without local recurrence. Conclusion: Through this case, we aim to emphasize the importance of using Clutch cutter and IT knife 2 as a modified technique which makes ESD a safe procedure in treatment of EGC with severe submucosal fibrosis.

scholarly journals Role of magnifying endoscopy with narrow‐band imaging in the diagnosis of noninvasive gastric neoplasia

JGH Open ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 446-453
Author(s):  
Keisuke Tanaka ◽  
Shinya Maekawa ◽  
Takashi Yoshida ◽  
Tatsuya Yamaguchi ◽  
Shinichi Takano ◽  
...  
Keyword(s):  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy ◽  
Gastric Neoplasia

A Case of Esophageal Xanthoma with Epithelial Reactive Inflammation with a Characteristic Finding of Narrow-Band Imaging Magnifying Endoscopy

2019 ◽  
Vol 38 (1) ◽  
pp. 85-88
Author(s):  
Hideki Mori ◽  
Motohiko Kato ◽  
Toshio Uraoka
Keyword(s):  
Biopsy Specimen ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Basal Layer ◽  
Excisional Biopsy ◽  
Magnifying Endoscopy ◽  
Thoracic Esophagus ◽  
Characteristic Finding ◽  
Capillary Loop ◽  
White Substance

A 75-year-old woman had a 5 mm slightly elevated yellowish lesion in her thoracic esophagus. Narrow-band imaging magnifying endoscopy (NBI-ME) revealed aggregations of a tiny white substance beneath each intrapapillary capillary loop with weaving, dilatation, and a different shape. In this case, an irregular caliber was absent. The biopsy specimen taken from the lesion showed cells with large nuclei and increased chromatin clumping in the basal layer. These cells were positive for p53. Endoscopic submucosal dissection was performed for the purpose of excisional biopsy. Finally, it was diagnosed as an esophageal xanthoma with a benign epithelial reactive inflammation. This is the first report of esophageal xanthoma showing the characteristic NBI-ME finding of esophageal xanthoma. Further studies are required to determine whether the characteristic finding of NBI-ME is generally found in esophageal xanthomas.

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