title: Keratoacanthoma developing on a pigmented patch in incontinentia pigmenti.
abstract: Cutaneous manifestations of incontinentia pigmenti (IP) have classically been described as three sequential stages: an initial vesicobullous stage, a verrucous stage and a stage of swirled pigmentation. Verrucous lesions tend to last longer than vesicobullous eruptions, often persisting until 1 year of age. However, adult patients with verrucous lesions are rare. We report a case of keratoacanthoma with marked dyskeratosis on a pigmented patch in a 20-year-old woman. This tumor, like subungual keratotic tumors of IP, might have been developed as one of the late manifestations of the disease.
authors.affiliation: Department of Dermatology, Asahikawa Medical College, Asahikawa, Japan. mc9@asahikawa-med.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Sakai
authors.forename: M
authors.initials: M
authors.lastname: Minami
authors.forename: E
authors.initials: E
authors.lastname: Satoh
authors.forename: S
authors.initials: S
authors.lastname: Matsuo
authors.forename: H
authors.initials: H
authors.lastname: Iizuka
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007184:Incontinentia Pigmenti / Q000150:complications / Q000473:pathology*; D007636:Keratoacanthoma / Q000150:complications / Q000473:pathology*; D007642:Keratosis / Q000473:pathology; D012867:Skin / Q000473:pathology