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Figure 2: a) H & E, x40. Photomicrograph showing a tumor situated underneath the ciliated columnar epithelium, where the tumor cells are arranged in nests. b) H & E, x200. The tumor cells show high nuclear to cytoplasmic ratio and hyperchromatic nuclei. No peripheral pallisading or retraction artifacts were noted. c) H & E, x200. At places continuation with the overlying dysplastic epithelium and focal squamous differentiation was identified (Black arrows). d) H & E, x400. Higher power photomicrographs show hyperchromatic closely packed nuclei with molding and high mitotic activity

Figure 2: a) H & E, x40. Photomicrograph showing a tumor situated underneath the ciliated columnar epithelium, where the tumor cells are arranged in nests. b) H & E, x200. The tumor cells show high nuclear to cytoplasmic ratio and hyperchromatic nuclei. No peripheral pallisading or retraction artifacts were noted. c) H & E, x200. At places continuation with the overlying dysplastic epithelium and focal squamous differentiation was identified (Black arrows). d) H & E, x400. Higher power photomicrographs show hyperchromatic closely packed nuclei with molding and high mitotic activity