title: Proliferating cell nuclear antigen and Ki-67 immunohistochemistry of oligodendrogliomas with special reference to prognosis.
abstract: BACKGROUND
  The biologic behavior of oligodendrogliomas is somewhat unpredictable. A supplementary prognostic factor is, therefore, desirable.
  
  
  METHODS
  Thirty-two pure supratentorial oligodendrogliomas were investigated using proliferating cell nuclear antigen (PCNA) and Ki-67 immunohistochemical analyses. The correlation of PCNA and Ki-67 labeling index (LI) with prognosis were studied, and the correlation of LI with clinical data was evaluated.
  
  
  RESULTS
  The PCNA LI had a range of 0-17% (mean, 5.27%; standard deviation [SD] = 4.65), and the Ki-67 LI had a range of 0-29% (mean, 4.19%; SD = 5.66). In general, the PCNA LI seemed to be higher than the Ki-67 LI. The mean survival time was 4.4 years, and 5- and 10-year survival rates were 38% and 19%, respectively. Ki-67 and PCNA staining indicated that patients with a high LI (> 3% and > 4%, respectively) had a significantly higher mortality, with mean survival time of 23.5 months and 26.2 months, respectively. No significant correlation between LI (or survival) and tumor size, cerebral localization, radiation, resection/biopsy, sex, age, or cytologic atypia was found.
  
  
  CONCLUSIONS
  The use of Ki-67 and PCNA LI higher than 3% and 4%, respectively, appears reliable as prognostic factors when investigating pure supratentorial oligodendrogliomas.
authors.affiliation: Department of Pathology, Glostrup Hospital, Copenhagen, Denmark.
authors.forename: S
authors.initials: S
authors.lastname: Heegaard
authors.forename: H M
authors.initials: HM
authors.lastname: Sommer
authors.forename: H
authors.initials: H
authors.lastname: Broholm
authors.forename: O
authors.initials: O
authors.lastname: Broendstrup
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000951:Antigens, Neoplasm / Q000032:analysis*; D002648:Child; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis*; D009687:Nuclear Proteins / Q000032:analysis*; D009837:Oligodendroglioma / Q000276:immunology / Q000401:mortality / Q000473:pathology*; D011379:Prognosis; D018809:Proliferating Cell Nuclear Antigen / Q000032:analysis*; D015173:Supratentorial Neoplasms / Q000276:immunology / Q000401:mortality / Q000473:pathology*; D015996:Survival Rate
chemical_list: D000951:Antigens, Neoplasm; D019394:Ki-67 Antigen; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D018809:Proliferating Cell Nuclear Antigen