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Figure 2: Histopathological examination (Haematoxylin Eosin) shows atypia across the entire thickness of epithelium with focal nests of cells extending into underlying stroma (a; 10x). Keratin pearls are visible (b – yellow arrow; 40x) and the tumor cells have an eosinophilic cytoplasm with coarse chromatin and prominent nucleoli; mitotic figures can also be identified (b – white arrow) |
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