EWSR1 and desmoplastic small round cell tumor: EWS-WT1, the chimeric product of a recurrent t(11;22)(p13;q12) translocation that fuses the 5′ exons of the EWS gene to the 3′ exons of the WT1 gene, constitutes the distinctive hallmark of desmoplastic small round cell tumor (DSRCT) [38–40].