Kaplan-Meier plots of EFS and OS of MGZL and PMBL. (A) EFS was 62% (95% CI, 42% to 79%) for MGZL (blue curve) compared with 93% (95% CI, 81% to 98%) for PMBL (red curve) at 5 years (P = .0005). (B) OS was 74% (95% CI, 51% to 89%) for MGZL (blue curve) compared with 97% (95% CI, 83% to 99%) for PMBL (red curve) at 5 years (P = .0012).