title: DNA content in adenoid cystic carcinomas.
abstract: BACKGROUND
  A retrospective study was performed on 51 patients with adenoid cystic carcinomas to see whether DNA ploidy, tumor stage, and histopathologic grading correlated with prognosis.
  
  
  METHODS
  Histopathologic grading was performed according to Szanto et al and DNA content was estimated from archived material using the technique by Hedley et al.
  
  
  RESULTS
  Thirty-nine tumors were DNA diploid and 12 were DNA aneuploid. Histologic grade III was more often associated with DNA aneuploidy than the lower grades (p = 0.011). DNA ploidy also correlated with clinical stage (p = 0.011). Log-rank analysis and Cox regression analysis of treatment failures revealed significant findings for S-phase value and DNA ploidy.
  
  
  CONCLUSIONS
  Our results indicate that DNA ploidy estimations, S-phase value, and histologic grading are prognostic factors in adenoid cystic carcinomas. These examinations should therefore be incorporated in the evaluation of patients with adenoid cystic carcinomas.
authors.affiliation: Department of Otolaryngology, University Hospital, Trondheim, Norway.
authors.forename: G
authors.initials: G
authors.lastname: Franzén
authors.forename: S
authors.initials: S
authors.lastname: Nordgård
authors.forename: M
authors.initials: M
authors.lastname: Boysen
authors.forename: P L
authors.initials: PL
authors.lastname: Larsen
authors.forename: T B
authors.initials: TB
authors.lastname: Halvorsen
authors.forename: O P
authors.initials: OP
authors.lastname: Clausen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000782:Aneuploidy; D003528:Carcinoma, Adenoid Cystic / Q000235:genetics* / Q000473:pathology; D004273:DNA, Neoplasm / Q000032:analysis*; D004171:Diploidy; D005260:Female; D005434:Flow Cytometry; D005500:Follow-Up Studies; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012044:Regression Analysis; D016196:S Phase; D012468:Salivary Gland Neoplasms / Q000235:genetics* / Q000473:pathology; D015996:Survival Rate; D017211:Treatment Failure
chemical_list: D004273:DNA, Neoplasm