Fig. 5. Significance of MLK4 staining on overall survival (OS) and progression free survival (PFS) according to the presence or absence of microsatellite instability. Kaplan-Meier plots of OS (A, C) and PFS (B, D) according to MLK4 expression in microsatellite stable (MSS) or (A, B) microsatellite instable (MSI) tumors (C, D).