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从诊断,治疗决策到遗传风险评估:ctDNA测试对综合癌症管理的影响 - 一个案例报告
Nisha Kanwar1, Abidoye B Seyi2, Nelly Tan3
11Division of Laboratory Genetics and Genomics, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN.
Journal of the National Comprehensive Cancer Network : JNCCN
|February 11, 2026
概括
循环瘤DNA (ctDNA) 测试在最初被诊断为胰腺癌的患者中发现了原发性肺癌. 这种微创试验指导了治疗,并揭示了遗传风险因素,改善了患者管理.
科学领域:
- 在瘤学瘤学.
- 分子诊断学 分子诊断
- 遗传学 遗传学 是一个
背景情况:
- 组织活检对不可访问的瘤或样本不足的限制.
- 循环瘤DNA (ctDNA) 提供了一种最小侵入性的方法来捕获瘤异质性.
- 准确的诊断对于有效的癌症治疗和管理至关重要.
研究的目的:
- 为了说明ctDNA测试在诊断同步原发性癌症中的实用性.
- 展示ctDNA分析如何指导向治疗的选择.
- 突出ctDNA在识别可操作的生物标志物和遗传风险方面的作用.
主要方法:
- 组织活检和ctDNA的下一代测序 (NGS).
- 滴滴数字PCR用于向突变检测.
- 免疫组织化学用于变种局部化.
- 对遗传性癌症综合征进行生殖线检测.
主要成果:
- ctDNA测试发现了EGFR p.L858R变异,表明非小细胞肺癌 (NSCLC),尽管最初的胰腺腺癌诊断.
- 在淋巴结局部化的EGFR变异,而不是胰腺组织,支持同步的肺初级.
- 胰腺活检显示了KRAS p.Q61变体,在ctDNA中不存在,这表明胰腺的ctDNA分泌量很低.
- 用osimertinib治疗的EGFR突变NSCLC导致了部分反应.
- 细菌线检测发现了CDKN2A变体,表明遗传性癌症综合征,并促使监测.
结论:
- ctDNA测试对于诊断同步原发性癌症和克服组织活检局限性是有价值的.
- 通过ctDNA识别可操作的突变,便于制定个性化的治疗策略.
- ctDNA分析有助于全面评估癌症,包括遗传风险评估和管理.
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