A recent study using a limited number of tumor samples has shown that NKX2.2, a putative transcriptional target of EWSR1-FLI1, is a useful marker for the diagnosis of ES.    ///    "A recent study using a limited number of tumor samples has shown that NKX2.2, a putative transcriptional target of EWSR1-FLI1, is a useful marker for the diagnosis of ES. "    ///    "The combination of CD99 and NKX2.2, a transcriptional target of EWSR1-FLI1, is highly specific for the diagnosis of Ewing sarcoma.. "    ///    "In the present study, the immunohistochemical expression of NKX2.2 was evaluated on 46 genetically confirmed ES and 85 non-ES SRCTs, together with comparative assessment of CD99 and other molecular targets of EWSR1-FLI1, including NR0B1, E2F3, and EZH2. "