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a Convoluted structures of tall columnar epithelial cells (arrow) (H&E ×400); b CEOT-like areas consisting of polyhedral, eosinophilic epithelial cells of squamous appearance with distinct cell boundaries and intercellular bridges (arrow) with calcified material (asterisk) (H&E ×400); c calcified material between the solid nests (arrow) (H&E ×400); d osteodentin juxtaposed to tumor cells (arrow) (H&E ×400)
