title: Expression of cyclin D1 and Ki-67 in squamous cell carcinoma of the oral cavity: clinicopathological and prognostic significance.
abstract: The prognostic and clinicopathologic significance of cyclin D1 and Ki-67 expressions was studied in oral squamous cell carcinomas. We performed an immunohistochemical study to determine the level of expression of cyclin D1 and Ki-67 labelling index in tumor specimens obtained from 35 patients, of whom 14 died as a result of recurrent disease, and 20 were free of recurrence at the end of the follow-up period. Overexpression of cyclin D1 was significantly associated with regional lymph node metastases (P=0.00005) and advanced tumor stage (P=0.0007). The relative risk for nodal metastases in the cases that overexpressed cyclin D1 was 2.6. The Ki-67 labelling index was significantly (P=0.001) higher in tumors with poor histologic grade of differentiation. Our results showed that cyclin D1 is a useful prognostic factor, and suggested it could be a marker to help determine the appropriate treatment for patients with oral squamous cell carcinoma. Cyclin D1 and Ki-67 overexpression were positively correlated.
authors.affiliation: Department of Oral and Maxillofacial Surgery, University Hospital of Oviedo, Oviedo, Spain. jvicente@correo.uniovi.es
authors.forename: Juan
authors.initials: J
authors.lastname: Carlos de Vicente
authors.forename: Agustín
authors.initials: A
authors.lastname: Herrero-Zapatero
authors.forename: Manuel Florentino
authors.initials: MF
authors.lastname: Fresno
authors.forename: Juan Sebastián
authors.initials: JS
authors.lastname: López-Arranz
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D014408:Biomarkers, Tumor / Q000032:analysis; D002294:Carcinoma, Squamous Cell / Q000737:chemistry* / Q000401:mortality / Q000556:secondary; D019938:Cyclin D1 / Q000032:analysis*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000032:analysis*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000737:chemistry* / Q000401:mortality / Q000473:pathology; D009363:Neoplasm Proteins / Q000032:analysis*; D009367:Neoplasm Staging; D011379:Prognosis; D012306:Risk; D015996:Survival Rate
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D009363:Neoplasm Proteins; D019938:Cyclin D1