EWSR1 and endometrioid stromal sarcoma: Such an event would be analogous to the formation of EWSR1-DDIT3 in myxoid liposarcoma, EWSR1-ERG in Ewing sarcoma, and the EPC-PHF1, JAZF1-PHF1, and MEAF6-PHF1 fusions in endometrial stromal sarcoma [36–39].