Fig. 3From: Cavernous sinus involvement in human papillomavirus associated oropharyngeal squamous cell carcinoma: case report of an atypical site of distant metastasisHistology sections of sellar lesion. Biopsy of sellar tumor demonstrating non-keratinizing p16 squamous cell carcinoma. Immunohistochemistry demonstrating: a poorly differentiated cancer with squamous differentiation; b immunohistochemistry demonstrating diffuse p16 positivity; and c diffuse p63 positivityBack to article page