EWS/pPNET and DSRCT exhibit similar features in morphology and immunohistochemistry. Detection of EWS-FLI1 fusion transcript in paraffin-embedded tissues of EWS/pPNET by RT-PCR is a reliable marker for molecular diagnosis.

• EWS/pPNET与促结缔组织增生性小圆细胞肿瘤(DSRCT)具有重叠的形态学和免疫组化特点,石蜡包埋组织中检测EWS-FLI1融合基因的表达可作为诊断EWS/pPNET的可靠指标。