1. Roles of Ki-67 and p16 as biomarkers for unknown primary head and neck squamous cell carcinoma.
- Author
-
Maebayashi, Toshiya, Ishibashi, Naoya, Aizawa, Takuya, Sakaguchi, Masakuni, Saito, Tsutomu, Kawamori, Jiro, Tanaka, Yoshiaki, Hirotani, Yukari, and Homma, Taku
- Subjects
CHEMORADIOTHERAPY ,SQUAMOUS cell carcinoma ,HEAD & neck cancer ,HEAD & neck cancer patients - Abstract
Purpose: Treatment guidelines have not been established for unknown primary head and neck squamous cell carcinoma (SCC). For these patients, chemoradiotherapy (CRT) can provide a better prognosis than that for patients with other head and neck cancers. The presence of HPV in the tumor is associated with a better outcome. However, not all patients with HPV-positive unknown primary head and neck SCC experience good treatment outcomes in actual clinical settings.Methods: We thus retrospectively determined the Ki-67 proliferation index and p16 expression status to assess the associations of these parameters with treatment outcomes of patients with unknown primary head and neck SCC.Results: The subjects were 13 patients who underwent CRT after surgery or excision biopsy between 1999 and 2016. The 2- and 5-year overall survival (OS) rate was 76.9% and 68.4%, respectively. The prognostic factor was age. There was no significant difference in survival between patients with a high Ki-67 vs. low Ki-67 or between patients with p16-positive vs. p16-negative metastases OS. However, all p16-positive patients with low Ki-67 showed good locoregional control.Conclusions: The combination of ki67 expression and p16 expression status may allow prediction of local control more accurately than p16 expression status alone. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF