Phase 3 Randomized Trial of Topical Steroid Versus Placebo for Prevention of Radiation Dermatitis in Patients With Head and Neck Cancer Receiving Chemoradiation

Abstract

Radiation dermatitis is one of the most common acute toxicities induced by chemoradiation therapy (CRT) for head and neck cancer (HNC). The benefit of topical steroids in the management of radiation dermatitis is still unclear. This phase 3, multi-institutional, randomized, double-blind, placebo-controlled trial evaluated the efficacy and safety of topical steroids for radiation dermatitis inpatients with locally advanced HNC receiving CRT. Eligible patients were scheduled to receive bilateral neck irradiation (≥66 Gy) with concurrent cisplatin (≥200 mg/m2) as definitive or postoperative CRT. Patients were randomly assigned to receive either topical steroid or placebo when grade 1radiation dermatitis was observed or the total radiation dose reached 30 Gy. Basic skin care including gentle washing and moistening in the head and neck region was performed in both groups. The primary endpoint was the frequency of grade ≥2 radiation dermatitis, in accordance with the National Cancer Institute Common Terminology Criteria for Adverse Events, version 4.0. Grading of radiation dermatitis was performed by independent central review using photographs taken weekly. A total of 211 patients were enrolled (intention to treat: steroid 101 and placebo 102). The frequency of grade ≥2 radiation dermatitis was not significantly reduced with the steroid (73.3%; 95% confidence interval, 64.6%-81.9%) compared with the placebo (80.4%; 95% confidence interval, 72.7%-88.1%; P=.23), whereas the steroid significantly reduced the frequency of grade ≥3 radiation dermatitis (13.9% vs 25.5%; P=.034). No significant differences in adverse events, including local infection or compliance with CRT, were observed between the groups. Topical steroid may reduce the severity of radiation dermatitis in patients with HNC and thus may become an important therapeutic tool in the management of radiation dermatitis.