But CD99 expression was 95.0%(20/21) in EWS/PNET,71.4%(5/7) in poorly differentiated synovial sarcomas,66.7%(8/9) in rhabdomyosarcomas,75.0%(3/4) in esthesioneuroblastomas and 60%(3/5) in mesenchymal chondrosarcomas,respectively.

• CD99在EW S/PNET中阳性表达率为95.；2%25(20/21)；在分化差的滑膜肉瘤、横纹肌肉瘤、嗅神经母细胞瘤和间叶软骨肉瘤分别为71