title: Dermoscopic findings in a collision tumor composed of a dermatofibroma and a melanocytic nevus mimicking melanoma.
abstract: Collision tumors consist of two different neoplasms occurring concurrently in the same lesion. This association has been described for both benign and malignant neoplasms that may be difficult to identify. Therefore, dermoscopy is a valuable tool to make a correct diagnosis. We report a very unusual collision tumor composed of both a dermatofibroma and a melanocytic nevus mimicking melanoma.
authors.affiliation: Dermatology, Buenos Aires, Argentina.
authors.forename: Carolina
authors.initials: C
authors.lastname: Marcucci
authors.affiliation: Dermatology Section, Instituto de Investigaciones Médicas "A. Lanari", University of Buenos Aires, Argentina.
authors.forename: Emilia Cohen
authors.initials: EC
authors.lastname: Sabban
authors.affiliation: Dermatology, Buenos Aires, Argentina.
authors.forename: Paula
authors.initials: P
authors.lastname: Friedman
authors.affiliation: Dermatology, Buenos Aires, Argentina.
authors.forename: Rosario
authors.initials: R
authors.lastname: Peralta
authors.affiliation: Dermatopathology, Buenos Aires, Argentina.
authors.forename: Ricardo Sánchez
authors.initials: RS
authors.lastname: Marull
authors.affiliation: Dermatology Section, Instituto de Investigaciones Médicas "A. Lanari", University of Buenos Aires, Argentina.
authors.forename: Horacio
authors.initials: H
authors.lastname: Cabo
keywords: collision tumor; dermoscopy