STAG2 and Ewing sarcoma: Moreover, the Ewing sarcoma sample zccs207 retained STAG2 (p.Leu1132Ter) nonsense variant, TERT (c.-57A > C, 5’ UTR) noncoding single-nucleotide variant and TP53 (p.His193Tyr) missense variant (Fig. 3B; Table EV4).