Fig. 1From: Primary squamous cell carcinoma of the thyroid treated with concurrent chemoradiation and palliative immunotherapy: a case reportH&E stained cell block slides (A and B, 60X) demonstrating dysmorphic cells (arrows). CK5/6 immunohistochemical stain (C, 60×) with cytoplasmic staining highlighting cells of squamous differentiation. PAX-8 (Biocare Medical, BC12) immunohistochemical stain (D, 60×) with nuclear staining of the same cell cluster seen in CBack to article page