化学感受器瘤的X线、CT、MRI表现分析

ANALYSIS OF PARAGANGLIOMAS ON X-RAY, CT AND MRI

目的 :探讨 X线、CT、MRI对化学感受器瘤的诊断价值。方法 :收集 5例经手术病理证实的化学感受器瘤 ,分析其X线、 CT、 MRI表现。结果 :颈动脉体瘤血管造影显示肿瘤血供丰富 ,颈动脉分叉张开 ,呈握球状改变 ;MRI表现为肿瘤T1 、T2 - WI均呈高信号 ,并显示瘤内血管流空现象。肺部化学感受器瘤 X线表现为类圆形、密度均匀、边缘清楚致密阴影。腹后腔化学感受器瘤血管造影、CT均表现为血供丰富的肿块 ,瘤内可有缺血坏死的低密度区。结论 :血管造影、 CT、MRI颈部化学感受器瘤具有特征性的表现 ,而对其他部位病变的定位、定量诊断准确度高 。

Objective:To explore the diagnostic value of paragangliomas on X ray, CT and MRI Methods:5 cases of paragangliomas underwent surgery and pathology including 1 case of carotid body tumor,2 paraganglioma of lung and 2 retroperitoneal paragangliomas The imageologic appearances were analyzed Results:Carotid body tumor demonstrated hypervascular on angiography The carotid bifurcation opened widely presenting griping ball like appearance On MRI,the lesion showed hyperintensity on T 1WI and T 2WI with signal loss due to flow void Paragangliomas of lung revealed hyperdense mass with smooth sharp margin on X ray plain radiograhp Retroperitoneal paragangliomas demonstrated a hypervascular mass after intravenous contrast material on CT The center of tumor may revealed hypodensity region due to necrosis While on angiography retroperitoneal paragangliomas mainly showed hypervascular mass Conclusion:Cervical paraganglioma displays typical findings on angiography, CT and MRI In other part of the body the lesion's position and size are also definite but final diagnosis is limited