Partialy ulcerated mucosal fragments by nests, sheets, and syncytial clusters of malignant epithelial cells with indistinct cell borders, vesicular nuclei, prominent nucleoli, and moderate amounts of eosinophilic cytoplasm. Mitotic figures are readily identified. The tumor is intimately admixed with a dense lymphoplasmacytic infiltrate, imparting a lymphoepithelioma-like appearance.
Rough, lobulated, red lesion on the dorsal, lateral, and posterior surface of the tongue, extending anteriorly.
Soft tissue fragments collectively measured 1.3x1x0.7 mm.
Tongue lesion, biopsy: