EWSR1 and neoplasm: On the other hand, NFATC2 is a definitional non‐ETS fusion partner of EWSR1/FUS genes in phenotypically and biologically highly heterogeneous lesions/neoplasms that include simple bone cysts [7, 8], subsets of epithelioid vascular tumors of bone [9], and a heterogeneous group of unclassified epithelioid and round cell neoplasms/sarcomas of bone and soft tissue [10, 11, 12, 13, 14].