title: Collision tumors.
authors.affiliation: Hospital de Sant Pau i Santa Tecla de Tarragona, Tarragona, Spain. Electronic address: pzaballos@aedv.es.
authors.forename: P
authors.initials: P
authors.lastname: Zaballos-Diego
mesh_terms: D000368:Aged; D002280:Basal Cell Carcinoma / Q000473:pathology*; D046169:Dermoscopy; D005260:Female; D018219:Histiocytoma, Benign Fibrous / Q000473:pathology*; D006801:Humans; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*