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. 2021 Feb 1;113(1):5–11. doi: 10.32074/1591-951X-229

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Figure 1. — (A) Esophageal small cell neuroendocrine carcinoma undermining normal squamous esophageal mucosa; H&E, magnification 4x. (B) Small cell neuroendocrine carcinoma infiltrating the muscular wall of the esophagus; H&E, magnification 10x. (C) Diffuse positivity of neoplastic cells for synaptophysin, magnification 20x. (D) Faint, dot-like, positivity for Chromogranin A; magnification 20x. (E) High proliferative index, 80% (Ki-67 stain), magnification 20x.