良性血管外皮细胞瘤
Benign hemangiopericytoma
以上为机器翻译结果，长、整句建议使用 人工翻译 。
方法：35例血管外皮细胞瘤以5年随访结果为标准分成良、恶性2组，其中良性2 0例，恶性15例，对这些肿瘤的病理组织学特征与随访结果作对比研究。
Methods:35 cases of HPCs were divided into two groups by 5-year follow-up-survey result, 20 of which were benign and 15 were malignant.
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