title: Medullary and papillary carcinomas occurring as a collision tumor: report of a case.
abstract: Multiple thyroid carcinomas of divergent cellular origin are extremely rare. A case is presented in which two unrelated tumors, a medullary carcinoma and a papillary carcinoma, occurred as a collision tumor.
authors.affiliation: Department of Pathology, Long Island Jewish Medical Center-Queens Hospital Center Affiliate, Stony Brook, New York.
authors.forename: M J
authors.initials: MJ
authors.lastname: Gero
authors.forename: S
authors.initials: S
authors.lastname: Lipper
authors.forename: A E
authors.initials: AE
authors.lastname: Chernys
authors.forename: L
authors.initials: L
authors.lastname: Silver
mesh_terms: D000368:Aged; D002277:Carcinoma / Q000473:pathology* / Q000648:ultrastructure; D002291:Carcinoma, Papillary / Q000473:pathology* / Q000648:ultrastructure; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000648:ultrastructure; D013964:Thyroid Neoplasms / Q000473:pathology* / Q000648:ultrastructure