论文部分内容阅读
目的探讨磁共振成像(magnetic resonance imaging,MRI)在臂丛神经鞘瘤诊断中的应用价值。方法分析36例经手术和病理证实的臂丛神经鞘瘤术前MRI表现。观察内容包括病变部位、肿块大小、边界、信号、强化特征及范围。结果MRI能清晰显示臂丛神经的根、干及分支,表现为线状低信号影。36例臂丛神经鞘瘤平均直径为4．9cm,均表现为沿臂丛神经根生长的肿块,其中30例表现为边界清楚的纺锤形或长圆形肿块。MRI显示,16例表现为均匀的T_1WI低或等信号(与肌肉相比),T_2WI高信号,增强后中等度强化；20例T_1WI呈低信号,T_2WI呈不均匀高信号,内见低信号区,所谓的“靶征”,增强后明显强化。结论臂丛神经鞘瘤具有特征性的发生部位、形态学表现及MRI信号特点,对本病能提供准确的诊断依据。
Objective To investigate the value of magnetic resonance imaging (MRI) in the diagnosis of brachial plexus schwannoma. Methods Preoperative MRI manifestations of 36 cases of neurilenal sheath tumors confirmed by surgery and pathology were analyzed. Observations include lesion size, mass size, borders, signals, enhancement features, and extent. Results MRI can clearly show the roots, stems and branches of brachial plexus, showing linear low signal. The average diameter of the brachial plexus schwannoma was 4.9 cm in 36 cases, all of which showed lumps growing along the brachial plexus roots. Thirty cases showed spindles or oblong tumors with clear boundary. MRI showed homogeneous or low T_1WI signal (compared with muscle), T_2WI high signal, enhanced moderate enhancement; 20 cases T_1WI showed low signal, T_2WI showed uneven high signal, see the low signal area , The so-called “target sign”, enhanced significantly enhanced. Conclusion Brachial plexus schwannoma has the characteristic site of occurrence, morphology and MRI signal characteristics, which can provide accurate diagnosis basis for this disease.