title: Perforating pilomatricoma on the upper eyelid.
abstract: We report a rare case of perforating pilomatricoma. A 50 x 40-mm oval nodule, with a whitish scale on its tip, developed on the left upper eyelid of a 43-year-old Japanese woman. There was no history of injury to the left upper eyelid. Histologic examination revealed typical microscopic features of pilomatricoma. In addition, however, an interesting phenomenon was observed: a portion of the tumor mass had extruded from the upper dermis to the skin surface through a perforating epidermal channel in the middle of the tumor. These findings are consistent with the diagnosis of perforating pilomatricoma.
authors.affiliation: Division of Plastic Surgery, Nara Medical University, Kashihara, Japan. niitsuma@nmu-gw.naramed-u.ac.jp
authors.forename: Katsunori
authors.initials: K
authors.lastname: Niitsuma
authors.forename: Masamitsu
authors.initials: M
authors.lastname: Kuwahara
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yurugi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Iioka
mesh_terms: D000328:Adult; D019882:Blepharoplasty; D005142:Eyelid Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006201:Hair Diseases / Q000473:pathology* / Q000601:surgery; D006801:Humans; D018296:Pilomatrixoma / Q000473:pathology* / Q000601:surgery; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery