title: Synchronous benign and malignant salivary gland tumors in ipsilateral glands: a report of two cases and a review of literature.
abstract: BACKGROUND
  Ipsilateral salivary gland tumors of different histologic types are rare and make up less than 0.3% of all salivary gland neoplasms. Only nine cases of synchronous benign and malignant ipsilateral parotid gland tumors have been described in the literature.
  
  
  METHODS
  Two additional cases of synchronous benign and malignant neoplasms in the parotid gland are reported and discussed with a review of literature.
  
  
  RESULTS
  Our first case describes a pleomorphic adenoma and a salivary duct carcinoma, an entity not previously reported in the literature. The second case documents the most common benign and malignant ipsilateral parotid gland neoplasm reported in this case series, a Warthin's tumor and a mucoepidermoid carcinoma.
  
  
  CONCLUSIONS
  Synchronous salivary gland tumors exhibiting both benign and malignant components are uncommonly observed, with only nine cases published to date. We describe two additional cases of a synchronous benign and malignant ipsilateral parotid gland tumor.
authors.affiliation: Department of Pathology, Loyola University Medical Center, Loyola University Medical Center, 2160 S First Avenue, Maywood, Illinois 60153, USA. jcurry3@luc.edu
authors.forename: Jonathan L
authors.initials: JL
authors.lastname: Curry
authors.forename: Guy J
authors.initials: GJ
authors.lastname: Petruzzelli
authors.forename: Kenneth D
authors.initials: KD
authors.lastname: McClatchey
authors.forename: Mark W
authors.initials: MW
authors.lastname: Lingen
mesh_terms: D000235:Adenolymphoma / Q000473:pathology; D008949:Adenoma, Pleomorphic / Q000473:pathology; D000368:Aged; D002277:Carcinoma / Q000473:pathology*; D018277:Carcinoma, Mucoepidermoid / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010307:Parotid Neoplasms / Q000473:pathology; D018987:Salivary Ducts; D012468:Salivary Gland Neoplasms / Q000473:pathology*