3.0T MRI对臂丛神经源性肿瘤的诊断价值

The diagnostic value 3.0T MRI in neurogenic tumors of the brachial plexus

目的探讨3．0TMRI对臂丛神经源性肿瘤的诊断价值，提高对该类疾病的影像学诊断水平。方法回顾性分析经手术病理证实27例臂丛神经源性肿瘤的MRI表现，观察内容包括病灶部位、大小、形态、信号特点及其与周围组织结构的关系，并进行表观扩散系数值（ADC）定量分析。结果良性肿瘤23例（神经鞘瘤14例，神经纤维瘤9例），良性肿瘤组内比较差异有统计学意义（P〈0．05），评价指标包括T2W IDEAL序列信号（高信号为主），瘤内囊变、出血改变，肿瘤与起源神经的位置关系。恶性神经鞘膜瘤4例，良恶性肿瘤组间比较差异有统计学意义（P〈0．05），评价指标包括肿瘤平均大小，形态，边界（生长方式），瘤周水肿及肿块ADC值。结论3．0T MRI对臂丛神经源性肿瘤的定位、定性诊断可靠，可作为首选的影像诊断检查方法。

Objective To explore the diagnostic value of 3.0T MRI in neurogenic tumor of the brachial plexus. Methods The MRI appearance of 27 neurogenic minors with pathological confirmation was retrospectively analyzed. The content of observation included size, shape, lesion signal characteristics, its relationship with the surrounding tissue structure, and quantitative determination of apparent diffusion coefficient （ADC） values. Results There were 23 cases of benign neurogenic tumors of the brachial plexus including 14 cases of Schwannoma and 9 cases of neurofibromatosis. The indicators of significant values included T2W IDEAL signal （high signal）, tumor internal capsule change or bleeding, and the relationship between tumor and the origin of the nerve （P〈0.05）. There were 4 cases of malignant nerve sheath tumors. The significant indicators comparing benign and malignant tumors were the average tumor diameter, shape, boundary （growth）, peritumoral edema and ADC values （P〈0.05）. Conclusion 3.0T MRI has a high reliability for localization and qualitative diagnosis of neurogenic tumor of the brachial plexus, which can be used as the preferred diagnostic imaging examination.