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一个多中心异位酸脱酶-野生型质母细胞瘤的病例,具有不同的克隆进化

Nozomi Shibuya¹, Nayuta Higa¹, Toshiaki Akahane²

¹Department of Neurosurgery, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, JPN.

|December 31, 2025

概括

这种罕见的多中心质母细胞瘤病例显示了两种不同的脑瘤,具有不同的遗传特征. 综合性遗传分析对于理解这种罕见的脑癌的预后和指导针对性治疗至关重要.

科学领域:

神经瘤学神经瘤学
分子病理学分子病理学
遗传学是一个遗传学.

背景情况:

多中心性质母细胞瘤 (mGBM) 是一种罕见的脑瘤,其特征是多个空间明显的病变.
大多数报告的mGBM病例表明单克隆起源,在病变中具有相似的分子谱.
在mGBM的遗传异质性对诊断,预后和治疗提出了挑战.

研究的目的:

呈现一种罕见的多中心质母细胞瘤病例,在空间分离的瘤中具有明显的分子配置.
强调在mGBM中进行综合基因分析的重要性.
探索分子分歧对患者预后和向治疗的影响.

主要方法:

大脑磁共振成像 (MRI) 和流体减弱反转恢复 (FLAIR) 成像用于病变检测.
两个阶段的手术切除,以完全切除两种瘤.
组织病理学检查以确认质母细胞瘤 (世界卫生组织4级).
针对性下一代测序 (NGS) 以确定每个瘤中的遗传变化.

主要成果:

组织病理学证实了这两种病变是异酸脱酶 (IDH) 野生型质母细胞瘤.
NGS揭示了不同的遗传特征:左侧瘤具有TERT促进子 (TERTp) 和BRAF V600E突变;右侧瘤具有TERTp突变,EGFR放大,MDM4放大和CDKN2A/B同胞缺失.
患者接受了标准化疗和放射治疗;右侧瘤在一年内复发,而左侧瘤没有复发.
左侧瘤中的BRAF V600E突变可能是治疗的目标,并导致其没有复发.

结论:

这一案例证明了多中心质母细胞瘤中空间上不同的瘤之间的显著分子分歧.
为了理解mGBM异质性,全面的基因分析至关重要.
不同的分子特征可以为预后提供信息,并确定个性化,有针对性的治疗策略的机会.

关键词:

这就是BRAF V600E突变.不同的克隆进化.egfr放大器的扩大第四种野生型质母细胞瘤多中心性质母细胞瘤

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