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. 2016 Dec 16;8(12):e932. doi: 10.7759/cureus.932

Figure 2. (A) An 80-year-old man presenting with left-sided facial droop, complete eyelid ptosis, and marked impairment of left ocular motility. (B) A photomicrographic biopsy of the supraorbital branch of the facial nerve revealing PNI of poorly differentiated squamous cell carcinoma (H&E 20x). (C) Positive staining for CK5/6 (20x).

Figure 2

PNI: perineural invasion; CK 5/6: cytokeratin 5/6