Efficacy of chemoradiotherapy in survival of stage Ⅳ nasopharyngeal carcinoma and establishment of a prognostic model.

Objectives: The efficacy of chemoradiotherapy regimen in the treatment of stage Ⅳ nasopharyngeal carcinoma (Ⅳ NPC) is not clear. This retrospective study aimed to reveal the benefit of chemoradiotherapy in Ⅳ-NPC and to develop a survival prognostic model for the disease prediction.

Materials And Methods: The Surveillance, Epidemiology, and End Results (SEER) database at https://seer.