Trichoepithelioma

QUESTION 54

A 54-year-old woman presents to the dermatology clinic as a referral from her otolaryngologist for the evaluation of a growing tumour on and around the left ear. She is unsure of how long the tumour has been present. On examination, there is a pink nodular plaque involving the tragus and spanning from the antitragus to the crus of the helix (54). On histology, there are basaloid islands in a sclerotic stroma with concentric collagen and many fibroblasts.