Pembrolizumab as Palliative Immunotherapy in Malignant Pleural Mesothelioma

Journal of Thoracic Oncology : Official Publication of the International Association for the Study of Lung Cancer
Yannis MetaxasThomas John

Abstract

There is no approved second-line treatment for malignant pleural mesothelioma (MPM). On the basis of promising early results, pembrolizumab was used off-label in Switzerland and Australia. We investigated outcomes in association with clinicopathological features and expression of programmed death ligand 1 (PD-L1). Registry data in Australia and Switzerland were pooled. Patient characteristics, including age, sex, histological subtype, and previous treatments were captured. Outcomes were assessed locally. PD-L1 expression was categorized as negative (<5%), intermediate (5%-49%), and high (≥50%). A total of 93 patients (48 from Switzerland and 45 from Australia) were treated; 68 patients (73%) had epithelioid MPM, and 67 (72%) had an Eastern Cooperative Oncology Group performance status of 0 or 1. Pembrolizumab was the second-line treatment in 48 of 93 patients (52%). PD-L1 expression results were available for 66 patients (71%). Most (68%) were negative, 18% were intermediate, and 14% were high for PD-L1 expression. In the full cohort, the overall response rate (ORR) was 18%, the median progression-free survival (mPFS) was 3.1 months, and the median overall survival was 7.2 months. In patients with an Eastern Cooperative Oncolog...Continue Reading

Citations

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