Derm Dx: Droopy eyebrow after surgery

A 66-year-old male presents for post-operative evaluation three-weeks after excision of a large highly invasive squamous cell carcinoma. Intraoperative frozen sections of the excised tissue demonstrated nerve invasion. Therefore, the nerve was transected during surgery.

The patient’s surgical site on the left side of his scalp is clean, dry and intact on examination. At rest, his left eyebrow appears ...