title: Testicular seminoma: clinical significance of nuclear deoxyribonucleic acid ploidy pattern as studied by flow cytometry.
abstract: OBJECTIVE
  We evaluated the clinical significance of deoxyribonucleic acid (DNA) ploidy pattern as a predictor of prognosis in patients with testicular seminoma.
  
  
  METHODS
  Flow cytometric nuclear DNA analysis was performed on archival specimens from 65 patients with pure seminoma who underwent radical orchiectomy between 1970 and 1992.
  
  
  RESULTS
  A total of 42 specimens (65%) exhibited a DNA diploid pattern, while 23 (35%) were DNA aneuploid. Diploidy was manifested in 73% of the stage I tumors versus 31% of stage II cancers (p = 0.004). No correlation was found between ploidy and histological type, size or local extension of the tumor. Tumor progression was observed in 5 patients, exclusively displaying aneuploid histograms (p = 0.0017), and 3 of them subsequently died of the disease.
  
  
  CONCLUSIONS
  DNA ploidy pattern may provide important prognostic information for patients with testicular seminoma.
authors.affiliation: Department of Urology, Chaim Sheba Medical Center, Tel Hashomer, Israel.
authors.forename: Y
authors.initials: Y
authors.lastname: Mor
authors.forename: I
authors.initials: I
authors.lastname: Leibovich
authors.forename: G
authors.initials: G
authors.lastname: Raviv
authors.forename: D
authors.initials: D
authors.lastname: Nass
authors.forename: O
authors.initials: O
authors.lastname: Medalia
authors.forename: B
authors.initials: B
authors.lastname: Goldwasser
authors.forename: O
authors.initials: O
authors.lastname: Nativ
mesh_terms: D000328:Adult; D000368:Aged; D000782:Aneuploidy; D004273:DNA, Neoplasm / Q000032:analysis*; D004171:Diploidy; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D011003:Ploidies; D011379:Prognosis; D018239:Seminoma / Q000401:mortality* / Q000473:pathology; D013736:Testicular Neoplasms / Q000401:mortality* / Q000473:pathology
chemical_list: D004273:DNA, Neoplasm