Safety and Efficacy of Radiation Therapy in Advanced Melanoma Patients Treated With Ipilimumab.

Published

Journal Article

Ipilimumab and radiation therapy (RT) are standard treatments for advanced melanoma; preclinical models suggest the potential for synergy. However, limited clinical information exists regarding safety and optimal timing of the combination.We reviewed the records of consecutive patients with unresectable stage 3 or 4 melanoma treated with ipilimumab. Patients were categorized as having received RT or not. Differences were estimated between these 2 cohorts.We identified 88 patients treated with ipilimumab. At baseline, the ipilimumab-plus-RT group (n=44) had more unfavorable characteristics. Despite this, overall survival, progression-free survival, and both immune-related and non-immune-related toxicity were not statistically different (P=.67). Patients who received ipilimumab before RT had an increased duration of irradiated tumor response compared with patients receiving ipilimumab after RT (74.7% vs 44.8% at 12 months; P=.01, log-rank test). In addition, patients receiving ablative RT had non-statistically significantly improved median overall survival (19.6 vs 10.2 months), as well as 6-month (95.1% vs 72.7%) and 12-month (79.7% vs 48.5%) survival rates, compared with those treated with conventionally fractionated RT.We found that both ablative and conventionally fractionated RT can be safely administered with ipilimumab without a clinically apparent increase in toxicity. Patients who received ipilimumab before RT had an increased duration of irradiated tumor response.

Full Text

Duke Authors

Cited Authors

  • Qin, R; Olson, A; Singh, B; Thomas, S; Wolf, S; Bhavsar, NA; Hanks, BA; Salama, JK; Salama, AKS

Published Date

  • September 2016

Published In

Volume / Issue

  • 96 / 1

Start / End Page

  • 72 - 77

PubMed ID

  • 27375168

Pubmed Central ID

  • 27375168

Electronic International Standard Serial Number (EISSN)

  • 1879-355X

International Standard Serial Number (ISSN)

  • 0360-3016

Digital Object Identifier (DOI)

  • 10.1016/j.ijrobp.2016.04.017

Language

  • eng