通过对尤文肉瘤细胞凋亡指数及相关调控基因表达产物ｐ１５蛋白的检测，了解其在尤文肉瘤中的表达水平，并初步探讨其临床及生物学意义。１资料与方法１．１病例选择 １９９０年３月～１９９７年８月，经临床表现、Ｘ线、病理确诊为尤文肉瘤患者１２例。男８例，女４例，年龄２ Through the detection of the apoptosis index of Ewing’s sarcoma cells and the expression of the related regulatory gene expression product p15 protein, the expression level in Ewing’s sarcoma was known, and its clinical and biological significance was explored. 1 Materials and Methods 1.1 Case Selection From March 1990 to August 1997, 12 cases of Ewing’s sarcoma were diagnosed with clinical manifestations, X-rays, and pathology. 8 males and 4 females, age 2