Subsequent DNA sequencing showed that the gene fusion involved exon 7 of EWS and exon 8 of WT1 genes. The fusion gene contained KTS sequence.

• RTPCR检测出EWSWT1融合性mRNA,测序结果显示由EWS基因的7号外显子与WT1基因的8号外显子融合所产生,融合性基因含有KTS序列。