眼眶血管外皮细胞瘤：20例临床病理分析及超微结构观察

眼眶血管外皮瘤２０例，其病理特点为Ｌ丰富的血管网，血管之间大量增生的梭形细胞，单个瘤细胞外有网状纤维包绕。根据肿瘤的异形程度及核分裂的数量诊断为良性，低度恶性及恶性血管外皮瘤．１０刚以下患诊诊断性要慎重。

A clinicopathological analysis and ultrastructural observation of 20 cases with hemangiopericytoma of the orbit

The clinical and pathologic aspects of twenty cases of orbital hemangiopericytomas are reported. In histopathology the tumors were characteristically full of blool vessels, between which there were abundant prolliferative spindle cells surrounded by reticular fibers. The benign and malignant tumors were differentially diagnosed accoring to the degree of cellular atypia and number of mitosis. Diangosis of malignant hamangiopericytoma should be made with caution for children under ten. The benign tumors should be completely resected while for malignant ones the enucleation must be performed as early as possible. The effect of radio therapyremains to be uncertain. In this series, 14 patients have been followed for an average of 6. 3 years, among them 3 died (21.4%),the longest duration of survival was 16 years.