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目的:探讨脑膜瘤立体定向放射外科(SRS)治疗后细胞增殖活性变化情况。方法:以9例曾行SRS治疗的脑膜瘤手术标本为研究材料,选取同期年龄相近,病理亚型相同,未行SRS治疗的脑膜瘤标本为对照组,采用免疫组织化学染色方法,检测肿瘤增殖细胞核抗原(PCNA)标记指数(PCNALI)值。结果:SRS治疗组PCNALI为0~4.4%(2.0±1.5%),未治疗组为2~28.9%(8.1±83.%),P<0.05。结论:放射外科治疗后脑膜瘤细胞增殖能力明显下降。
Objective: To investigate the changes of cell proliferative activity after stereotactic radiosurgery (SRS) in meningioma. Methods: 9 cases of meningiomas treated with SRS were selected as experimental materials. The meningiomas with the same age and the same pathological subtype without SRS were selected as the control group. Immunohistochemical staining was used to detect the tumor proliferation Cell nuclear antigen (PCNA) labeling index (PCNALI) values. Results: The PCNALI in SRS group was 0 4.4% (2.0 ± 1.5%) and in the untreated group 2 28.9% (8.1 ± 83%), P 0.05. Conclusion: The proliferative ability of meningioma cells after radiosurgery is obviously decreased.