CancerConnect News: The checkpoint inhibitor Keytruda (pembrolizumab) has been reported to produce an overall response rate of 30% in patients with PD-L1–positive, advanced esophageal cancer.1
http://cancer.unm.edu/2018/02/13/keytruda-promising-in-pd-l1-esophageal-cancer/
Keytruda Promising in PD-L1 Esophageal Cancer