'White opaque substance' and 'light blue crest' within gastric flat tumors or intestinal metaplasia: same or different signs?

摘要

To the Editor:We read with interest the article by Yao et al about a white opaque substance (WOS), a fine white reticular, ma2e-like, speckled pattern of the epithelial surface, within gastric flat tumors. With the use of magnifying endoscopy with narrow-band imaging (ME-NBI), the WOS was more frequently visualized in adenomas (7896) than in carcinomas (4396) and showed a regular distribution within adenomas (10096) but an irregular distribution within carcinomas (8396). Although they concluded that the morphologic analysis of the WOS could be a new useful optical sign, another similar optical sign, a light blue crest (LBC), had previously been described.