Consistent with our experimental findings, gene expression levels of T cell cytolysis markers (GZMB and perforin [PRF1]) in human UPS tumors were associated with improved survival (Figure 1, K and L, and Supplemental Figure 2D) and negatively correlated with YAP1 levels (Figure 1M). Here, YAP1 is linked to undifferentiated pleomorphic sarcoma.