title: Synchronous parotid tumors of different histological types in association with metastasizing hypopharyngeal carcinoma.
abstract: At operation for metastasizing carcinoma of the piriform sinus a patient was found to have two separate parotid tumors, one a pleomorphic adenoma and the other a papillary cystadenoma lymphomatosum (Warthin's tumor). These tumors presented as palpable masses on the same side as a lymph node involved with carcinoma. Synchronous parotid tumors of different types are rare; previous reports in the literature show that this combination of pleomorphic adenoma and Warthin's tumor is the most common. We have found no previous report of multiple parotid neoplasms in a patient with coexistent squamous carcinoma of the head and neck.
mesh_terms: D000235:Adenolymphoma / Q000150:complications* / Q000473:pathology; D008949:Adenoma, Pleomorphic / Q000150:complications* / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000150:complications / Q000473:pathology; D006258:Head and Neck Neoplasms / Q000150:complications / Q000473:pathology; D006801:Humans; D007012:Hypopharyngeal Neoplasms / Q000150:complications* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D010307:Parotid Neoplasms / Q000150:complications* / Q000473:pathology; D010610:Pharyngeal Neoplasms / Q000150:complications*