Dung T. Le, MD, of Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins University, and Axel Grothey, MD, of the Mayo Clinic, discuss how mismatch repair status predicts clinical benefit of immune checkpoint blockade with pembrolizumab (Abstract LBA100).
A phase II study identified the first genomic marker—mismatch repair deficiency—to predict clinical benefit of immune checkpoint blockade with the anti–PD-1 antibody pembrolizumab (Keytruda). Among 50 patients with colorectal cancer, 62% of the 25 patients with mismatch...