Hainan Medical College Development Corporation

The purpose of this study was to evaluate the efficacy and safety of large fractionation radiotherapy in nasopharyngeal carcinoma patients, and to analyze whether Hypofractionated radiotherapy is not inferior to conventional radiotherapy.

Radiation induced dermatitis (RID) is one of the leading adverse events of radiation therapy, and if occurred could alter the course of therapy. The main pathways of RID is inflammation and oxidative stress on local and systemic bases. The Diclofenac is a COX-2 inhibitor and Nonsteroidal anti-inflammatory drugs whose anti-inflammatory and antioxidant activities have been proven in several clinical trials. Thus, the aim of the present study is to evaluate the efficacy of Diclofenac sodium gel as a prophylactic method against the development of RID.