Expression of CALB1...was significantly lower in sensitive tumors (adjusted P [Padj] = 7.5x10-20), and expression of GRM1...was higher in selinexor sensitive tumors (Padj= 0.003). These findings were confirmed in an independent validation set (Padj = 0.01 – 0.02)....Selinexor sensitive DDLS tumors showed low expression of CALB1 and high GRM1.