A case of non‐ampullary duodenal adenoma showing whitish color changes during potassium‐competitive acid blocker treatment

Abstract

A 71‐year‐old male presented with suspected gastric cancer during screening. Esophagogastroduodenoscopy (EGD) revealed a slightly decolored flat lesion (diameter: 5 mm) on the duodenal bulb (Fig. 1a). On magnifying endoscopy with narrow‐band imaging (M‐NBI), meandering microvessels were visualized (Fig. 1b).

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