颈动脉体瘤的影像学诊断

目的 探讨CT、MRI、DSA检查在颈动脉体瘤诊断中的价值.方法 病理证实的10例颈动脉体瘤,其中4例行MRI T1WI、T2WI及对比增强MRA,6例行CT平扫加增强扫描,10例均行DSA和TBO试验.结果 10例术前CT、MRI、DSA均诊断为颈动脉体瘤,与临床及病理诊断符合率为100%.10例病变均位于颈动脉分叉处.CT平扫主要表现为均匀性低密度球形病灶,CT值25～37 Hu.MRI的特征为T1WI、T2WI均为高信号,中心有流空信号,MRA均清楚显示出病变的部位、大小、形态及血流动力学的特点.DSA表现为肿瘤包绕颈动脉,颈动脉分叉角度增大,肿瘤均匀染色,可显示供血动脉.结论 CT、MRI和DSA均有特征性表现,诊断比较容易,若将三种方法优化组合,可优势互补,为制定最佳手术方案提供科学、准确而全面的依据.

Imaging diagnosis of carotid body tumor

Objective To probe efficacy of CT, MRI and DSA in diagnming carotid body tumors. Methods 10 patients with carotid body tumor were confirmed by pathology. 4 patients underwent MRI with T1WI, T2WI and contrast-enhanced MRA. 6 patients underwent CT ordinary scan and enhanced scan. All patients underwent DSA and TBO. Results The preoperative diagnosis of 10 cases by CT, MRI and/or DSA had a 100% agreement rate with the clinical and pathological diagnosis as carotid body tumor. All lesions were located at bifurcation of the carotid artery. CT ordinary scan featured low-intensity and homogenous hall-shape lesions. The value of CT was 25-37 Hu. MRI featured high-intensity on T1WI and T2WI with flow-void signal in the center. MRA clearly showed seat, size, shape and blood dynamics in the leans. DSA of CBT showed tumor grasping carotid, enlarged carotid artery bifurcation, evenly stained tumor and blood-supplying artery. Conclusion Manifestations of body tumor in CT, MRI and DSA are characteristic, a combined use of them may enable them to complement each other, helping to offer information for a better choice of operation procedure.