A Boy with a Slow, Painless Nodule and Blister on the Back of His Neck

Abstract

Pilomatrixoma, also known as pilomatricoma, is a benign adnexal tumor very common in pediatric age and in young adults that derives from follicular matrix cells. It usually presents as a solitary, slow-growing dermal or subcutaneous nodule without symptoms. Several clinical variants of pilomatricomas have been described which include perforating, anetoderma, proliferating, pigmented multiple and familial. Blister type is a subtype of perforating, which is very rare. Here we reported a case of pilomatrixoma with blister, and introduce the characteristics of pilomatrixoma briefly.