title: [Case report of a double ano-rectal neoplasia (adenocarcinoma and melanoma)].
abstract: The association in a single organ of two neoplasms with different, histogenensis is uncommon. A dual ano-rectal neoplasms, pigmented malignant melanoma in collision with adenocarcinoma is reported, along with a discussion concerning the problems related with primary origin of the melanocytic component.
authors.affiliation: Istituto di Anatomia e Istologia Patologica, Unviersità di Genova.
authors.forename: A
authors.initials: A
authors.lastname: Di Marco
authors.forename: P
authors.initials: P
authors.lastname: Baccini
authors.forename: A
authors.initials: A
authors.lastname: Pastorino
authors.forename: P
authors.initials: P
authors.lastname: Nozza
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology* / Q000601:surgery; D000368:Aged; D001005:Anus Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology; D008544:Melanocytes / Q000473:pathology; D008545:Melanoma / Q000473:pathology* / Q000601:surgery; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D012004:Rectal Neoplasms / Q000473:pathology* / Q000601:surgery
vernacular_title: Segnalazione di un caso di doppia neoplasia ano-rettale (adenocarcinoma e melanoma).