title: Positive impact on surgical treatment for asymptomatic patients with esophageal carcinoma.
abstract: OBJECTIVE
  The prognosis of patients with esophageal carcinoma remains unsatisfactory. The purpose of this study was to clarify the clinicopathologic characteristics of asymptomatic patients.
  
  
  METHODS
  We retrospectively compared 78 cases of asymptomatic esophageal carcinoma (AEC) with 341 cases of symptomatic esophageal carcinoma (SEC).
  
  
  RESULTS
  In 47 of 78 patients with AEC, the tumors were discovered by mass screening and in 31 patents by follow-up examination for other disease. Nearly 70% of the patients with AEC had a carcinoma in situ (Tis) or T1 tumor, whereas nearly 70% of the patients with SEC had T3 or T4 tumors. The incidences of lymph node metastasis, lymphatic invasion and vascular invasion were significantly lower in patients with AEC than in those with SEC. The 5-year survival rate in AEC and SEC were 59.3% and 22.9%, respectively. With regard to the cause of death, 26.8% (11/41) of patients with AEC and 59.9% (166/277) of patients with SEC died of esophageal carcinoma.
  
  
  CONCLUSIONS
  In order to improve the prognosis of esophageal carcinoma, an effort should be made to detect early esophageal carcinoma among patients at risk for tumors when they are still asymptomatic.
authors.affiliation: First Department of Surgery, Kagoshima University School of Medicine, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Natsugoe
authors.forename: M
authors.initials: M
authors.lastname: Baba
authors.forename: M
authors.initials: M
authors.lastname: Shimada
authors.forename: F
authors.initials: F
authors.lastname: Kijima
authors.forename: C
authors.initials: C
authors.lastname: Kusano
authors.forename: H
authors.initials: H
authors.lastname: Yoshinaka
authors.forename: J
authors.initials: J
authors.lastname: Mueller
authors.forename: T
authors.initials: T
authors.lastname: Aikou
mesh_terms: D000368:Aged; D002278:Carcinoma in Situ / Q000175:diagnosis / Q000401:mortality / Q000473:pathology / Q000601:surgery; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis / Q000401:mortality / Q000473:pathology / Q000601:surgery; D004938:Esophageal Neoplasms / Q000175:diagnosis / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D009367:Neoplasm Staging; D011230:Precancerous Conditions / Q000175:diagnosis / Q000401:mortality / Q000473:pathology / Q000601:surgery*; D011379:Prognosis; D012189:Retrospective Studies; D015996:Survival Rate