title: [Significance of p53, PCNA and Ki-67 in the prognosis of squamous cell carcinoma of the oral cavity].
abstract: BACKGROUND
  A common gene alteration in human malignancies is the mutation of the p53 gene. Through mutation p53 loses its function as a tumor suppressor and enables the tumor to proliferate. Ki-67 and PCNA are proliferation markers. The aim of this study was to find a reference to the prognostic significance of p53, Ki-67, and PCNA in squamous cell carcinoma (SCC) of the oral cavity.
  
  
  METHODS
  Samples from 64 patients of the Department of Otolaryngology/Head and Neck Surgery, University of Bergen, Norway, with histologically proven SCC of the oral cavity were submitted to immunohistochemical procedure. All carcinomas were untreated.
  
  
  RESULTS
  59.3% of the patients showed a positive reaction for p53.Ki-67 and PCNA were expressed in about 68% of the cases, but with less staining intensity. No correlation could be found between the expression of the three antibodies and tumor factors such as tumor size, lymph nodes, degree of differentiation, recurrence and survival rate, the occurrence of second primaries, or the smoking habits of the patient.
  
  
  CONCLUSIONS
  The expression of the tumor suppressor gene p53 and the proliferation marker PCNA and Ki-67 seem to have no prognostic significance in SCC of the oral cavity.
authors.affiliation: Klinik für Hals-, Nasen- und Ohrenheilkunde, Med. Universität zu Lübeck.
authors.forename: T
authors.initials: T
authors.lastname: Sommer
authors.forename: J
authors.initials: J
authors.lastname: Olofsson
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000302:isolation & purification*; D002294:Carcinoma, Squamous Cell / Q000276:immunology*; D005260:Female; D016158:Genes, p53; D006801:Humans; D019394:Ki-67 Antigen / Q000302:isolation & purification; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000276:immunology*; D011379:Prognosis; D018809:Proliferating Cell Nuclear Antigen / Q000302:isolation & purification
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D018809:Proliferating Cell Nuclear Antigen