EWSR1 and neoplasm: Genetic testing revealed no mutation in the Dicer 1, Ribonuclease III (DICER) gene, no translocation of the Ewing Sarcoma breakpoint region 1/EWS RNA binding protein 1 (EWSR1) gene, and no amplification of the Murine Double Minute 2 (MDM2) gene in the tumor cells.