title: A pigmented lesion on the finger.
authors.affiliation: Dermatology Department, Hospital Provincial del Centenario de Rosario and Universidad Nacional de Rosario, Argentina ; Diagnóstico Médico Oroño, Rosario, Argentina.
authors.forename: Gabriel
authors.initials: G
authors.lastname: Salerni
authors.affiliation: Dermatology Department, Hospital Provincial del Centenario de Rosario and Universidad Nacional de Rosario, Argentina ; Diagnóstico Médico Oroño, Rosario, Argentina.
authors.forename: Carlos
authors.initials: C
authors.lastname: Alonso
authors.affiliation: Dermatology Department, Hospital Provincial del Centenario de Rosario and Universidad Nacional de Rosario, Argentina.
authors.forename: Mario
authors.initials: M
authors.lastname: Squeff
authors.affiliation: Pathology Department, Universidad Nacional de Rosario, Argentina.
authors.forename: Mario
authors.initials: M
authors.lastname: Gorosito
authors.affiliation: Dermatology Department, Hospital Provincial del Centenario de Rosario and Universidad Nacional de Rosario, Argentina.
authors.forename: Ramón A
authors.initials: RA
authors.lastname: Fernández-Bussy