title: Changes in the Ki-67 labeling rates of head and neck squamous cell carcinomas during preoperative radiation therapy.
abstract: Immunostaining with Ki-67 monoclonal antibody was performed on frozen sections of biopsy specimens obtained before and during preoperative radiation therapy from 21 patients with head and neck squamous cell carcinoma. The Ki-67 labeling rates before radiation therapy and at radiation doses of 10 and 20 Gy ranged from 21 to 71% (mean: 35.0%), from 7 to 49% (mean: 25.8%) and from 1 to 44% (mean: 14.8%), respectively. One of the 2 patients whose tumors showing Ki-67 labeling rates of greater than 48% (mean +1 SD) before radiation therapy suffered local relapse shortly after the treatment. Moreover, tumors with rapidly decreased Ki-67 labeling rates (lower than 3%) at radiation doses of 20 Gy were related to poor clinical outcome: 4 out of 6 patients whose tumors showed Ki-67 labeling rates below 3% (mean -1 SD) at 20 Gy of irradiation had local relapses or showed distant metastases. These findings indicate that immunostaining with Ki-67 monoclonal antibody of biopsy specimens of head and neck squamous cell carcinoma, before and during radiation therapy, is very useful in assessing the clinical outcome of the patients.
authors: Department of Radiology, Kochi Medical School, Japan.
authors: Y
authors: Y
authors: Ogawa
authors: T
authors: T
authors: Inomata
authors: A
authors: A
authors: Nishioka
authors: T
authors: T
authors: Maeda
authors: H
authors: H
authors: Seguchi
authors: S
authors: S
authors: Kishimoto
authors: H
authors: H
authors: Saito
authors: J
authors: J
authors: Hirota
authors: T
authors: T
authors: Osaki
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal / Q000276:immunology*; D002294:Carcinoma, Squamous Cell / Q000276:immunology* / Q000532:radiotherapy; D003131:Combined Modality Therapy; D005260:Female; D006258:Head and Neck Neoplasms / Q000276:immunology* / Q000532:radiotherapy; D006801:Humans; D019394:Ki-67 Antigen; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis*; D009687:Nuclear Proteins / Q000032:analysis*; D016896:Treatment Outcome
chemical_list: D000911:Antibodies, Monoclonal; D019394:Ki-67 Antigen; D009363:Neoplasm Proteins; D009687:Nuclear Proteins