title: Epidemiological investigation of esophageal carcinoma.
abstract: OBJECTIVE
  To review the characteristics of esophageal carcinoma in recent 30 years in the epidemiological investigation.
  
  
  METHODS
  A total of 1 520 cases of esophageal carcinoma in the First Affiliated Hospital of Zhejiang University Medical College admitted from 1970 until now were reviewed. Their age, gender, position of carcinoma and histological type were analyzed.
  
  
  RESULTS
  The morbidity of esophageal carcinoma was increasing during the observation period. Compared with the 1970s (9.5%), the ratio of adenocarcinoma significantly increased after the 1980s (19.1%). The difference was significant (P</=0.05).
  
  
  CONCLUSIONS
  The morbidity of esophageal adenocarcinoma was increasing and advanced clinical study should be strengthened.
authors.affiliation: Digestive Department, the First Affiliated Hospital, Medical College, Zhejiang University. No.79 Qingchun Road, Hangzhou, 310003, Zhejiang, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Shao-Hua
authors.initials: SH
authors.lastname: Chen
authors.forename: You-Ming
authors.initials: YM
authors.lastname: Li
mesh_terms: D000230:Adenocarcinoma / Q000401:mortality* / Q000473:pathology; D000328:Adult; D017677:Age Distribution; D002294:Carcinoma, Squamous Cell / Q000401:mortality* / Q000473:pathology; D002681:China / Q000453:epidemiology; D004938:Esophageal Neoplasms / Q000401:mortality* / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D017678:Sex Distribution