The t(11;22) were detected in 10 of 15 (66.7%) ES/pPNETs by CISH technique that consistent with the results of EWS-FLI1/ERG fusion transcripts detection.

• pPNET、骨外尤因肉瘤和Askin瘤三者在病理形态、免疫表型、超微结构等方面存在相当程度的重叠表现。 2、骨外ES/pPNETs的免疫诊断应联合CD99/FLI1、vim、NSE和其它神经标记如S-100、Syn、CgA等标记物。