scholarly journals “Pink Pattern” Visualized in Magnifying Endoscopy With Narrow-Band Imaging Is a Novel Feature of Early Differentiated Gastric Cancer: A Bridge Between Endoscopic Images and Histopathological Changes

2021 ◽  
Vol 8 ◽  
Author(s):  
Shengsen Chen ◽  
Jiangping Yu ◽  
Rongwei Ruan ◽  
Yandong Li ◽  
Yali Tao ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Epithelial Cells ◽  
Predictive Value ◽  
Color Change ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy ◽  
Cosine Similarity ◽  
Gastric Cancer Cells ◽  
Sensitivity Specificity

Background: A pink color change occasionally found by us under magnifying endoscopy with narrow-band imaging (ME-NBI) may be a special feature of early gastric cancer (EGC), and was designated the “pink pattern”. The purposes of this study were to determine the relationship between the pink pattern and the cytopathological changes in gastric cancer cells and whether the pink pattern is useful for the diagnosis of EGC.Methods: The color features of ME-NBI images and pathological images of cancerous gastric mucosal surfaces were extracted and quantified. The cosine similarity was calculated to evaluate the correlation between the pink pattern and the nucleus-to-cytoplasm ratio of cancerous epithelial cells. Two diagnostic tests were performed by 12 endoscopists using stored ME-NBI images of 185 gastric lesions to investigate the diagnostic efficacy of the pink pattern for EGC. The diagnostic values, such as the area under the curve (AUC), the accuracy, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV), of test 1 and test 2 were compared.Results: The cosine similarity between the color values of ME-NBI images and pathological images of 20 lesions was at least 0.744. The median AUC, accuracy, sensitivity, specificity, PPV, and NPV of test 2 were significantly better than those of test 1 for all endoscopists and for the junior and experienced groups.Conclusions: The pink pattern observed in ME-NBI images correlated strongly with the change in the nucleus-to-cytoplasm ratio of gastric epithelial cells, and could be considered a useful marker for the diagnosis of differentiated EGC.

scholarly journals The “Pink Pattern” Visualized in Magnifying Endoscopy with Narrow-Band Imaging is a New Feature of Early Gastric Differentiated Cancer——A Bridge Between Endoscopic Image and Histopathological Change

2021 ◽  
Author(s):  
Shengsen Chen ◽  
Jiangping Yu ◽  
Rongwei Ruan ◽  
Yali Tao ◽  
Zhao Cui ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Epithelial Cells ◽  
Predictive Value ◽  
Color Change ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Magnifying Endoscopy ◽  
Cosine Similarity ◽  
Diagnostic Efficiency ◽  
Sensitivity Specificity

Abstract Background A pink color change found occasionally by us under the magnifying endoscopy with narrow-band imaging (ME-NBI) may be a special feature of early gastric cancer (EGC), and it was named as “pink pattern”. The purposes of this study were to reveal the relationship between the “pink pattern” and the cytopathological changes of gastric cancer cells, and explore whether the pink pattern was useful for the diagnosis of EGC. Methods The color features of ME-NBI images and pathological images on gastric cancerous mucosal surface were extracted and quantized, and then the cosine similarity was calculated to evaluate the correlation between the pink pattern and the nucleus-to-plasm ratio of cancerous epithelial cells. Two diagnostic tests were performed by 12 endoscopists using stored ME-NBI images of 185 gastric lesions to investigate the diagnostic efficiency of “pink pattern” for EGC. The diagnostic values such as area under curve (AUC), accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) between test 1 and test 2 were compared. Results The cosine similarity in 20 lesions between the color values of ME-NBI images and pathological images was at least 0.744. The median AUC, accuracy, sensitivity, specificity, PPV and NPV of test 2 were significantly improved compared with that of test 1 in all endoscopists, junior and experienced groups. Conclusions The “pink pattern” visualized in ME-NBI images is highly correlated with the nucleus-to-plasma ratio change of gastric epithelial cells, and it can be considered as a useful marker for the diagnosis of the differentiated EGC.

scholarly journals Evaluation of Microvascular Patterns Alone Using Endocytoscopy with Narrow-Band Imaging for Diagnosing Gastric Cancer

Digestion ◽  
2021 ◽  
pp. 1-10
Author(s):  
Yusuke Horiuchi ◽  
Toshiaki Hirasawa ◽  
Naoki Ishizuka ◽  
Junki Tokura ◽  
Mitsuaki Ishioka ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Predictive Value ◽  
Narrow Band ◽  
Narrow Band Imaging ◽  
Diagnostic System ◽  
Validation Group ◽  
Specific Training ◽  
Sensitivity Specificity ◽  
Development And Validation ◽  
Development Group

<b><i>Introduction:</i></b> Although endocytoscopy (EC) with narrow-band imaging (NBI) is effective in diagnosing gastric cancer, no diagnostic system has been validated. We explored a specific diagnostic system for gastric cancer using EC with NBI. <b><i>Methods:</i></b> Equal numbers of images from cancerous and noncancerous areas (114 images each) were assessed by endoscopists with (development group: 33) and without (validation group: 28) specific training in magnifying endoscopy with NBI. Microvascular and microsurface patterns (MS) in each image were evaluated. Lesions were diagnosed as cancerous when patterns were deemed “irregular.” The accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of a diagnosis according to patterns on EC with NBI (microvascular pattern [MV] alone, MS alone, and both) were evaluated and compared between groups to determine the diagnostic performance. <b><i>Results:</i></b> In the development and validation groups, diagnoses based on the MV alone had significantly higher accuracy (91.7% vs. 76.3%, <i>p</i> &#x3c; 0.0001 and 92.5% vs. 67.5%, <i>p</i> &#x3c; 0.0001, respectively) and sensitivity (88.6% vs. 68.3%, <i>p</i> &#x3c; 0.0001 and 89.5% vs. 38.6%, <i>p</i> &#x3c; 0.0001, respectively) than those based on the MS alone. In both groups, there were no significant differences in diagnostic accuracy between using the MV alone and both patterns. <b><i>Discussion/Conclusion:</i></b> Evaluation of the MV alone is a simple and accurate diagnostic method for gastric cancer. This system could find widespread applications in clinical practice.

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

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.

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