title: Case for diagnosis.
abstract: Focal acral hyperkeratosis is a rare genodermatosis with an autosomal dominant pattern of inheritance. It is characterized by usually asymptomatic keratotic papules along the borders of the hands and/or feet. The main differential diagnosis is acrokeratoelastoidosis of Costa, which differs from the former only by not presenting elastorrhexis in histopathological examination, thus requiring this exam for a correct diagnosis.
authors.affiliation: Padre Bento of Guarulhos Hospital Complex, Guarulhos, SP, Brazil.
authors.forename: Daniela Tiemi
authors.initials: DT
authors.lastname: Sano
authors.affiliation: Padre Bento of Guarulhos Hospital Complex, Guarulhos, SP, Brazil.
authors.forename: Luciana Valentini de
authors.initials: LV
authors.lastname: Melo
authors.affiliation: Padre Bento of Guarulhos Hospital Complex, Guarulhos, SP, Brazil.
authors.forename: Antonio José
authors.initials: AJ
authors.lastname: Tebcherani
authors.affiliation: Padre Bento of Guarulhos Hospital Complex, Guarulhos, SP, Brazil.
authors.forename: Ana Paula Galli
authors.initials: AP
authors.lastname: Sanchez
mesh_terms: D000328:Adult; D001706:Biopsy; D020405:Dermis / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007645:Keratoderma, Palmoplantar / Q000473:pathology*