Abstract
Pilomatrixoma, also known as a calcifying epithelioma, is a benign tumor originating from a hair follicle. We present a case of pilomatrixoma in a 7-year-old girl complaining of swelling in the cheek. Clinical examination disclosed a mass 10mm in diameter and it was totally removed. The microscopic examination showed encapsulated tumors mainly composed of eosinophilic ghost cells and partly with basophilic portions in hyalinized fibrous stroma with calcification. Preoperative ultrasound and magnetic resonance imaging gave us useful information for complete tumor excision that the tumor existed just under the skin and the risk of facial palsy would be relatively low.
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