title: Prognostic significance of DNA ploidy in mucoepidermoid carcinoma.
abstract: Thirty-four mucoepidermoid carcinomas were studied retrospectively with regard to histological and clinical parameters. In 28 of the tumors DNA patterns were also assessed using flow cytometry. Twenty-two of the 28 tumors (79%) were DNA diploid and 6 (21%) DNA aneuploid. Two tumors (7%) showed intratumoral DNA as indicated by different stemlines in specimens investigated from different parts of the tumor. DNA ploidy correlated significantly with cervical lymph node status (P < 0.01), but not with tumor size or histological grade. The mean S-phase value was 2.7% and was significantly higher in aneuploid samples than in diploid ones (P < 0.05). The recurrence rate was significantly lower for patients with stage I and II tumor compared with those with stage III and IV disease (P < 0.01). Five aneuploid tumors showed significantly higher recurrence rates (5/6) than the diploid ones (1/22) (P < 0.01). In univariate analysis for survival, only N stage tumor (P < 0.05) and tumor DNA ploidy (P < 0.0003) had significant prognostic influence. Thus, DNA ploidy seems to be a valuable parameter for evaluating the biological behavior of mucoepidermoid carcinomas of the salivary glands.
authors.affiliation: Department of Otolaryngology/Head & Neck Surgery, University Hospital, Linköping, Sweden.
authors.forename: P
authors.initials: P
authors.lastname: Gemryd
authors.forename: P G
authors.initials: PG
authors.lastname: Lundquist
authors.forename: M
authors.initials: M
authors.lastname: Tytor
authors.forename: H B
authors.initials: HB
authors.lastname: Hellquist
authors.forename: B
authors.initials: B
authors.lastname: Nordenskjöld
mesh_terms: D000328:Adult; D000782:Aneuploidy; D018277:Carcinoma, Mucoepidermoid / Q000473:pathology* / Q000532:radiotherapy / Q000601:surgery; D003131:Combined Modality Therapy; D004273:DNA, Neoplasm / Q000032:analysis*; D004171:Diploidy; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D018714:Radiotherapy, Adjuvant; D012468:Salivary Gland Neoplasms / Q000473:pathology* / Q000532:radiotherapy / Q000601:surgery; D012469:Salivary Glands / Q000473:pathology / Q000601:surgery
chemical_list: D004273:DNA, Neoplasm