PMC5139838_01
(a) Low power view of duodenal squamous cell carcinoma. HE, x 40. (b) Keratinization is recognized. HE, x 200. (c) Individual keratinization and intercellular bridges are recognized. HE, x 400. (c) Obvious intercellular bridges are recognized. HE, x 400.
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F1
All the six biopsies showed malignant cells arranged in a medullary pattern (Fig.1a). Keratinization was recognized in several areas (Fig. 1b, c). Intercellular bridges were also recognized in several areas (Fig. 1c, d).