title: [Analysis of the proportion of salivary gland tumors in 528 elder patients].
abstract: OBJECTIVE
  To analyse the clinical characteristic, evolution and prognosis of undifferentiated carcinoma with lymphoid stroma(malignant lymphoepithelial The purpose of this study was to investigate the present proportional ratio of salivary gland tumors in elder patients, to provide references for early diagnosis and treatment clinically.
  
  
  METHODS
  The medical data of 528 elder patients with salivary gland tumors treated in our department in 1990s were reviewed and analyzed.
  
  
  RESULTS
  The number of salivary gland tumors in elder patients had increased in recent years. These tumors were frequently found in patients of 60-74 years. The ratio of benign to malignant was 1.7:1. In benign tumors, the proportion of adenolymphoma approached pleomorphic adenoma. While in malignant tumors, adenoid cystic carcinoma accounted the most. These tumors were most commonly found in the parotid gland, followed by the palate. The prevalence of female had an increase trend.
  
  
  CONCLUSIONS
  The proportion of salivary gland tumor in elder patients in 1990s was different from that in 1980s. This change should attract enough attention form the surgeons.
authors.affiliation: Department Of Oral & Maxillofacial Surgery, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Hu
authors.forename: J
authors.initials: J
authors.lastname: Sun
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Zhang