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• W2034983968 abstract "Background: Combining the Narrow band imaging (NBI) system and magnifying endoscope clearly visualize micro structures of the superficial mucosal patterns and its capillary patterns. Aim: To investigate gastric mucosal patterns by using magnifying NBI endoscopy, and its relation to H. pylori induced gastritis and gastric cancer (GC) occurrence. Method: Capillary and mucosal structures by magnifying NBI in the uninvolved gastric corpus were divided into following categories: normal pattern; small round pits surrounded by regular sub epithelial capillary network (SCEN) with collecting venuls (CV), type1; slightly enlarged round pit with unclear or irregular SCEN, type2; obviously enlarged oval or prolonged pit with increased density of irregular vessels, type 3; well demarcated oval or tubulo-villous pit with clearly visible coiled or wavy vessels. In study A, correlations between NBI gastric mucosal patterns and H. pylori infection, histological severity of gastritis, serum pepsinogen, and endscopic gastric atrophy were assessed in 106 subjects. In study B, the association between NBI gastric mucosal patterns and occurrence of gastric cancer (GC) was investigated among all subjects undergoing magnifying NBI upper endoscopy from April 2007 to October 2008. Results: In Study A, the sensitivity and specificity of type 1 + 2 +3 for detection of H. pylori infection positive was, 95.2% and 82.2%. Advance of the mucosal patterns from normal to type 1, 2, and 3 was correlated with all histological parameters (acute inflammation; R=0.38, p<0.0001, chronic inflammation; R=0.69, p<0.0001, atrophy; R=0.58, p<0.0001, and intestinal metaplasia; R=0.52, p<0.0001). The sensitivity and specificity of type 3 for detection of intestinal metaplasia was, 73.3% and 95.6%. Advance of the mucosal patterns was inversely correlated with serum pepsinogen I/II ratios (R=-0.78, p<0.0001), and positively correlated with extension of endoscopic atrophy (R=0.72, p<0.0001). The sensitivity and specificity of type 3 pattern for predict severe histological atrophy was 50.0%, and 96.3%, and was favorable when compared to serum pepsinogen and standard endoscopy. In study B, advance of the mucosal patterns from normal to type 1, 2, and 3 was significantly associated with GC occurrence (R=0.49, p<0.0001). Conclusions: Gastric mucosal pattern by using magnifying NBI endoscopy closely correlates with H. pylori infection, and histological severity of gastritis. Furthermore, these patterns is also useful to predict the conditions of atrophic gastritis in the entire stomach, and GC occurrence. (Tahara T. Gastrointestinal Endoscopy, in press)" @default.
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• W2034983968 date "2009-04-01" @default.
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• W2034983968 title "Gastric Mucosal Pattern Using Magnifying NBI Endoscopy Clearly Distinguishes Histological, and Serological Severity of Chronic Gastritis and Predicts Gastric Cancer Occurrence" @default.
• W2034983968 doi "https://doi.org/10.1016/j.gie.2009.03.397" @default.
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