title: Onychomatricoma: a tumor unknown to dermatologists.
abstract: A sixty-one year old white female was referred to the Dermatology Department to treat an ingrown nail in the inner corner of the left hallux. Examination of the entire nail unit showed the presence of xanthonychia in the outer corner besides thickening and increase in the transverse curvature of the nail plate. Dermoscopy and nuclear magnetic resonance of the free edge of the nail plate detected characteristic signs of onychomatricoma, a diagnosis that was later confirmed by anatomopathological exam.
authors.affiliation: Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
authors.forename: Glaysson Tassara
authors.initials: GT
authors.lastname: Tavares
authors.affiliation: Hospital do Servidor Público Municipal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Nilton Gioia Di
authors.initials: NG
authors.lastname: Chiacchio
authors.affiliation: Hospital do Servidor Público Municipal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Nilton Di
authors.initials: ND
authors.lastname: Chiacchio
authors.affiliation: Universidade Federal de Minas Gerais (UFMG), Belo Horizonte, MG, Brazil.
authors.forename: Marcos Vilela de
authors.initials: MV
authors.lastname: Souza
mesh_terms: D003880:Dermatology; D046169:Dermoscopy; D005260:Female; D006214:Hallux / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009260:Nail Diseases / Q000473:pathology* / Q000601:surgery; D009263:Nails, Ingrown / Q000473:pathology / Q000601:surgery; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery
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