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Immunohistochemical analysis of podoplanin expression. Representative examples of podoplanin expression in normal laryngeal epithelium (A), dysplastic epithelium with negative podoplanin staining (B), dysplastic epithelium with positive podoplanin staining scored as 2 (C) and 3 (D), laryngeal carcinomas showing diffuse podoplanin expression (E) and focal expression (F).
