title: Collision tumors: A diagnostic challenge.
authors.affiliation: Department of Digital Dermoscopy, Instituto Gamma, Rosario, Argentina.
authors.forename: Maria Clara
authors.initials: MC
authors.lastname: Bernardini
authors.affiliation: Dermatology and Skin Cancer Unit, Arcispedale Santa Maria Nuova Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Reggio Emilia, Italy. Electronic address: elvira.moscarella@gmail.com.
authors.forename: Elvira
authors.initials: E
authors.lastname: Moscarella
authors.affiliation: Dermatology and Skin Cancer Unit, Arcispedale Santa Maria Nuova Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Reggio Emilia, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Borsari
authors.affiliation: Dermatology and Skin Cancer Unit, Arcispedale Santa Maria Nuova Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Reggio Emilia, Italy.
authors.forename: Aimilios
authors.initials: A
authors.lastname: Lallas
authors.affiliation: Dermatology and Skin Cancer Unit, Arcispedale Santa Maria Nuova Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS), Reggio Emilia, Italy.
authors.forename: Caterina
authors.initials: C
authors.lastname: Longo
authors.affiliation: Pathology Unit, Arcispedale Santa Maria Nuova IRCCS, Reggio Emilia, Italy.
authors.forename: Simonetta
authors.initials: S
authors.lastname: Piana
authors.affiliation: Dermatology Unit, Second University of Naples, Naples, Italy.
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Argenziano
mesh_terms: D000328:Adult; D002280:Basal Cell Carcinoma / Q000175:diagnosis* / Q000473:pathology; D046169:Dermoscopy; D005260:Female; D006801:Humans; D018613:Microscopy, Confocal; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis* / Q000473:pathology; D009506:Nevus / Q000175:diagnosis* / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology
keywords: basal cell carcinoma; collision tumors; confocal microscopy appearance; dermoscopy appearance; junction nevus; pigmented lesions