title: What is the earliest malignant lesion in the esophagus?
abstract: BACKGROUND
  The incidence of early esophageal cancer is definitely increasing due to recent advances in diagnostics. When we discuss early carcinoma of the esophagus, however, there is still controversy as to whether dysplasia is either benign or the earliest malignant lesion.
  
  
  METHODS
  Nineteen resected esophaguses with both cancer and dysplasia (including 19 cancers concomitant with 26 dysplastic lesions) were studied for expression of p53 protein.
  
  
  RESULTS
  Immunohistochemical overexpression of p53 protein in esophageal dysplasia is almost the same as that in cancer.
  
  
  CONCLUSIONS
  Esophageal dysplasia should be recognized as the earliest malignant lesion which already demonstrates cancerous features although it is not immediately critical. A routine endoscopic Lugol's solution test is very useful for both detection and following-up of the early nests in the esophagus. These lesions are good candidates for endoscopic mucosal resection for the purpose of accurate diagnosis or curative treatment.
authors.affiliation: Department of Surgery II, Kyushu University, Fukuoka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kitamura
authors.forename: H
authors.initials: H
authors.lastname: Kuwano
authors.forename: M
authors.initials: M
authors.lastname: Yasuda
authors.forename: K
authors.initials: K
authors.lastname: Sonoda
authors.forename: K
authors.initials: K
authors.lastname: Sumiyoshi
authors.forename: S
authors.initials: S
authors.lastname: Tsutsui
authors.forename: M
authors.initials: M
authors.lastname: Kitamura
authors.forename: K
authors.initials: K
authors.lastname: Sugimachi
mesh_terms: D004938:Esophageal Neoplasms / Q000175:diagnosis* / Q000473:pathology* / Q000628:therapy; D004947:Esophagus / Q000473:pathology; D006801:Humans; D007150:Immunohistochemistry; D011230:Precancerous Conditions / Q000175:diagnosis / Q000473:pathology / Q000628:therapy; D016159:Tumor Suppressor Protein p53 / Q000032:analysis
chemical_list: D016159:Tumor Suppressor Protein p53