\n\n
\n\n如果手术时脑膜瘤无法切除完全或者手术后的病理标本证实为高级别的脑膜瘤,则再次复发的可能性更大。
\n\n即使良性的 WHO I 级脑膜瘤,手术切除后也有部分肿瘤出现复发,而且复发率与 Simpson 切除程度密切相关,Simpson 切除级别越高,脑膜瘤切除越不彻底甚至没有切除完全,以后复发的比例也就越高。
\n\n脑膜瘤 Simpson 切除分级的 I、II、III 级都属于肿瘤完全切除,其 5 年、10 年和 15 年的复发率分别为 7%~23%,20%~39% 和 24%~60%,也就是随着手术后时间的延长,复发率是逐渐升高的。而部分切除的脑膜瘤,也就是脑膜瘤 Simpson 切除分级的 IV 级和 V 级切除,复发率则更高,其 5 年、10 年和 15 年的复发率分别为 37%~62%,52%~100% 和 70% 或更高[1]。
\n\n \n\n影响脑膜瘤复发的另一个重要因素是肿瘤的 WHO 病理分级,病理级别越高则复发可能性越大。WHO II 级脑膜瘤的复发率就比 WHO I 级的脑膜瘤高,完全切除后 5 年无进展生存率为 60%~80%。而恶性的 WHO III 级脑膜瘤单纯手术完全切除后的 5 年无进展生存率仅为 28%,切除不完全则为 0,但放疗能明显提高 WHO III 级的恶性脑膜瘤的 5 年无进展生存率。
\n\n脑膜瘤手术前的一些 MRI(magnetic resonance imaging,磁共振成像)特征可以提示复发可能性的大小,肿瘤最大直径大于 5 厘米、蘑菇形状、位于颅底的位置、肿瘤周围水肿明显等与脑膜瘤手术切除后复发相关。
\n\n脑膜瘤手术切除后的标本中 VEGF(vascular endothelial growth factor,血管内皮生长因子)的表达、Ki-67 指数高等也是复发相关的因素。
\n\n此外,脑膜瘤手术后标本的一些分子指标也能反映脑膜瘤是否早期复发,比如 TERT 启动子突变,但是这些分子指标还不能替代脑膜瘤的 WHO 分级。
\n\n脑膜瘤标本的 DNA 甲基化状态对肿瘤复发和进展起到了较好的预测作用,脑膜瘤能够通过 DNA 的甲基化分为 6 个不同的亚型,这种甲基化分类的方法比 WHO 病理分级更加准确地预测脑膜瘤最终是否会复发[2][3][4]。
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