Microscopic Description -- Right Cheek Mass


Multiple H&E stained sections demonstrate an inflitrative, keratin-producing tumor involving the skin surface and underlying soft tissue of the right cheek. The tumor extends down to and invades into the periosteum of the right mandible, in the area of a prior tooth extraction. There is no overt bony invasion seen grossly nor microscopically. The tumor cells are epithelioid, with abundant eosinophilic cytoplasm and round hyperchromatic nuclei with prominent nucleoli. There is formation of intercellular bridges and keratin pearls.

Final Diagnosis


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