Eyelid pilomatrixoma: a description of 16 cases and a review of the literature.

Pilomatrixoma is an uncommon benign neoplasm that originates from the matrix of the hair root. It occurs more frequently in the head and neck region of children and adolescents, often involving the eyelid or eyebrow. Pilomatrixoma is often misdiagnosed clinically and the correct diagnosis can be established only after excision and histological examination. Pathologic diagnosis of pilomatrixoma is based on the finding of large masses of shadow cells, combined with basophilic cells, inflammation, foreign body giant cells, calcification, and ossification. We report 16 cases of eyelid pilomatrixoma that were treated in our department, and review the relevant literature.