结果：(1)骨原始神经外胚层肿瘤来源于神经嵴的胚胎迁移细胞。
Results: (1) Osseous PNET originated from embryonic migrating cells of neural crest.
目的探讨幕上原始神经外胚层肿瘤的临床特点、影像学特征、综合治疗方法及对预后影响。
Objective To analyze the clinical features, neuroimaging presentations, and treatment and prognosis of supratentorial primitive neuroectodemal tumors.
材料与方法：对2例骨原始神经外胚层肿瘤的临床表现、影像特征进行描述，并结合文献分析。
Materials and Methods: The clinical findings and the imaging features of 2 cases with osseous PNEI were described and analyzed.
方法分析经手术病理证实的9例原始神经外胚层肿瘤的MRI表现，其中男6例，女3例，平均年龄32 6岁。
Methods MRI manifestations of 9 PNET diagnosed via operation and pathological examination were analyzed. There were 6 men and 3 women, and the mean age was 32.6 years.
结果肿瘤含有横纹肌样细胞、原始神经外胚层、上皮及间叶多向分化成分。
Results The tumor containing rhabdoid cells, variable components of primitive neuroectodermal, epithelial and mesenchymal components.
结果肿瘤含有横纹肌样细胞、原始神经外胚层、上皮及间叶多向分化成分。
Results The tumor containing rhabdoid cells, variable components of primitive neuroectodermal, epithelial and mesenchymal components.
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