PMC7332494_01
Computed tomography images: A. Axial slice showing a heterogeneously enhancing left parotid mass with deep lobe involvement B. Coronal reconstruction showing the same enhancing mass.
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Multiple pathological lymph nodes were also seen along the vicinity of the mass and in the neck (Fig. 1).
A) Photomicrograph showing discohesive high grade tumors cells with irregular nuclei and prominent nucleoli. There are no light microscopic features of squamous or glandular differentiation (eg. intercellular bridges, keratinization or mucin production) but the cells stained positively for broad spectrum keratin, consistent with a carcinoma. There are small mature lymphocytes in the background (H&E 400x). B) Immunohistochemistry for the p63 antibody, consistent with squamous differentiation (400x).
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No glandular or squamous differentiation was distinguished on hematoxylin and eosin sections. (Fig. 2).