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Medulloblastoma in Adults: Cytogenetic Phenotypes Identify Prognostic Subgroups
Journal of Neuropathology and Experimental Neurology ( IF 3.2 ) Pub Date : 2021-04-19 , DOI: 10.1093/jnen/nlab020
Tobias Goschzik 1 , Anja Zur Muehlen 1 , Evelyn Doerner 1 , Andreas Waha 1 , Carsten Friedrich 2 , Peter Hau 3 , Torsten Pietsch 1
Affiliation  

Adult medulloblastomas (MB) are rare. We investigated the genetic landscape and prognostic impact of genetic aberrations in a cohort of 117 adult medulloblastomas. Histological features and pathway activation were evaluated at the protein level; 14.5% showed wingless-type activation, 63.3% SHH activation, and 22.2% were classified as non-WNT/non-SHH-MB. Genome-wide copy number analysis was performed by molecular inversion probe array technology. MB-related genes were sequenced in WNT- and SHH-activated MBs. 79.7% of SHH-MBs showed desmoplastic/nodular histology; all other MBs had classic histology. WNT-MBs carried oncogenic CTNNB1 mutations in 88.2% and had monosomy 6 in 52.9%. In SHH-MBs, TERT promoter mutations occurred in 97%, mutations in PTCH1 in 38.2%, SMO in 15.5%, SUFU in 7.4%, and TP53-mutations in 4.1%. In all, 84.6% of non-WNT/non-SHH-MBs had an isochromosome 17q. A whole chromosomal aberration (WCA) signature was present in 45.1% of SHH-TP53-wild type (wt)-MBs and 65.4% of non-WNT/non-SHH-MBs. In 98 cases with survival data, WNT-MBs had a 5-year overall survival (OS) of 68.6%. SHH-MBs TP53wt type and non-WNT/non-SHH-MBs showed 5-year OS of 80.4% and 70.8%, respectively. TP53-mutant SHH-MBs represented a prognostically unfavorable entity; all patients died within 5 years. Patients with a WCA signature showed significantly increased OS (p = 0.011 for SHH-TP53wt-MBs and p = 0.048 for non-WNT/non-SHH-MBs).

中文翻译:

成人髓母细胞瘤:细胞遗传学表型识别预后亚组

成人髓母细胞瘤 (MB) 很少见。我们调查了一组 117 例成人髓母细胞瘤的遗传图谱和遗传畸变对预后的影响。在蛋白质水平评估组织学特征和通路激活;14.5% 显示无翼型激活,63.3% SHH 激活,22.2% 被归类为非 WNT/非 SHH-MB。通过分子倒置探针阵列技术进行全基因组拷贝数分析。MB 相关基因在 WNT 和 SHH 激活的 MB 中进行测序。79.7% 的 SHH-MB 表现出促纤维增生/结节组织学;所有其他 MB 均具有经典组织学。WNT-MBs 携带致癌 CTNNB1 突变的占 88.2%,具有 52.9% 的单体 6。在 SHH-MBs 中,97% 发生 TERT 启动子突变,38.2% 发生 PTCH1 突变,15.5% 发生 SMO,7.4% 发生 SUFU,4.1% 发生 TP53 突变。总共有 84 个。6% 的非 WNT/非 SHH-MB 具有等染色体 17q。45.1% 的 SHH-TP53-野生型 (wt)-MB 和 65.4% 的非 WNT/非 SHH-MB 中存在全染色体畸变 (WCA) 特征。在有生存数据的 98 例病例中,WNT-MB 的 5 年总生存率 (OS) 为 68.6%。SHH-MBs TP53wt 型和非 WNT/非 SHH-MBs 的 5 年 OS 分别为 80.4% 和 70.8%。TP53 突变的 SHH-MB 代表预后不良的实体;所有患者均在 5 年内死亡。具有 WCA 特征的患者显示 OS 显着增加(SHH-TP53wt-MB 的 p = 0.011,非 WNT/非 SHH-MB 的 p = 0.048)。SHH-MBs TP53wt 型和非 WNT/非 SHH-MBs 的 5 年 OS 分别为 80.4% 和 70.8%。TP53 突变的 SHH-MB 代表预后不良的实体;所有患者均在 5 年内死亡。具有 WCA 特征的患者显示 OS 显着增加(SHH-TP53wt-MB 的 p = 0.011,非 WNT/非 SHH-MB 的 p = 0.048)。SHH-MBs TP53wt 型和非 WNT/非 SHH-MBs 的 5 年 OS 分别为 80.4% 和 70.8%。TP53 突变的 SHH-MB 代表预后不良的实体;所有患者均在 5 年内死亡。具有 WCA 特征的患者显示 OS 显着增加(SHH-TP53wt-MB 的 p = 0.011,非 WNT/非 SHH-MB 的 p = 0.048)。
更新日期:2021-04-19
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