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在2HG检测中的陷与TE优化的MRS在3T

Seyma Alcicek^1,2,3,4, Dunja Simicic¹, Lindsay Blair^5,6

¹Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.

medRxiv : the preprint server for health sciences

|April 16, 2025

概括

在体内磁共振光谱学 (MRS) 可以检测到IDH突变质瘤中的2-基酸盐 (2HG). 然而,与GABA和乙的光谱重叠可能会在非瘤组织中引起假阳性,影响诊断的准确性.

科学领域:

神经成像是一种神经成像.
生物标志物生物标志物
在瘤学瘤学.

背景情况:

在体内磁共振光谱 (MRS) 检测到2-基酸盐 (2HG),这是异酸脱酶 (IDH) 突变质瘤的潜在生物标志物.
之前的研究表明IDH突变与IDH野生型质瘤的诊断准确度很高,但关于区分与非瘤组织的知识较少.

研究的目的:

评估TE优化的2HG MRS在区分IDH突变质瘤与看起来正常的大脑组织中的准确性.
调查光谱建模策略对2HG检测的影响.
识别导致假阳性2HG信号的因素.

主要方法:

48名怀疑患有IDH突变结质瘤的患者接受了针对2HG的3T PRESS MRS (TE=97ms).
来自瘤和逆侧非瘤组织的MRS数据使用LCModel进行了分析.
接收器操作特征 (ROC) 分析评估了诊断性能;检查了代谢物相关性.

主要成果:

与以前的文献相比,TE优化的PRESS对IDH突变质瘤和非瘤组织的敏感性 (0.62-0.76) 和特异性 (0.78-0.85) 较低.
在各种建模策略中观察到胺黄油酸 (GABA) 和2HG之间的强烈负相关性.
一个案例研究突出显示了酸盐 (一种体) 对饮食患者的干扰.

结论:

与GABA和乙的光谱重叠可以导致在非瘤大脑组织中假阳性2HG检测.
临床医生必须意识到这些潜在的陷,当解释2HGMRS发现的结质瘤诊断.
可能需要进一步的研究来完善光谱分析并提高诊断特异性.

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