Pneumonitis with combined immune checkpoint inhibitors and chemoradiotherapy in locally advanced non-small-cell lung cancer: a systematic review and meta-analysis.

This study systematically evaluated cases of pneumonitis following combined immune checkpoint inhibitors (ICI) and chemoradiotherapy (CRT) for locally advanced non-small-cell lung cancer (LA-NSCLC). Studies from Embase, PubMed and the Cochrane Library on patients with LA-NSCLC who received CRT and ICIs were reviewed. The primary outcomes were rates of all-grade, grade 3-5 and grade 5 pneumonitis. Overall, 35 studies involving 5000 patients were enrolled. The pooled rates of all-grade, grade 3-5 and grade 5 pneumonitis were 33.0% (95% CI: 23.5-42.6), 6.1% (95% CI: 4.7-7.4) and 0.8% (95% CI: 0.3-1.2), respectively, with 7.6% of patients discontinuing ICIs because of pneumonitis. The incidence rates of pneumonitis following combined CRT and ICIs for LA-NSCLC were acceptable. However, the pulmonary toxicity of concurrent CRT and nivolumab plus ipilimumab should be noted.