RT-PCR is a feasible method for the detection of EWS-FLI1 fusion transcripts in FFPE tissues in PNET and the result is meaningful in differential diagnosis and prognostic evaluation of the tumor.

• 在外周原始神经外胚叶瘤石蜡包埋组织中,用嵌套式RT- PCR检测EWS- FLI1融合基因是可行的方法,检测结果对肿瘤鉴别诊断和预后判断有意义。