MSCT增强扫描对腹膜后副神经节瘤的诊断价值

Value of MSCT Enhancement Scanning in Diagnosis of Retroperitoneal Paraganglioma

目的：探讨腹膜后副神经节瘤的MSCT特征性表现及增强扫描的诊断价值,以提高对该病的认识和诊断正确率。方法：回顾性分析10例经手术病理证实的腹膜后副神经节瘤的临床和MSCT资料,总结其CT特征。结果：10例患者中8例均行平扫及增强扫描,2例仅行平扫。10例均表现为腹膜后腹主动脉旁单发的类圆形囊实性肿块,左右侧各5例,直径约4~20 cm;10例肿块平扫密度不均匀,其内多发囊变（9例）、分隔（6例）及散在斑点状钙化（2例）,增强后实性成分、囊壁及分隔明显强化,并可见迂曲强化的血管影,囊性成分无强化。结论：腹膜后副神经节瘤的增强CT表现具有一定的特征性,实性成分明显强化及囊变具有定性诊断价值,术前正确诊断对防止手术并发症具有重要意义。

Objective To investigate the characteristics of retroperitoneal paraganglioma in multi-slice CT（ MSCT） for better understanding it and improving the accuracy rate of its diagnosis. Methods The clinical and MSCT data of 10 patients with retroperitoneal paraganglioma confirmed with surgical pathology were retrospectively analyzed,and the MSCT characteristics of retroperitoneal paraganglioma was summarized. Results Plain scan and enhancement scan were performed in eight cases,and single plain scan was performed in the other two cases. The solitary round cystic mass with 4 - 20 cm diameter,which were closed to the right or left side of retroperitoneal abdominal aorta,were respectively observed in five cases by MSCT.Plain scan in the mass of ten cases showed the characteristic of uneven density,which were cystic degeneration in 9 cases,separation in 6 cases,and sporadic stippled calcification in 2 cases. Furthermore,enhanced CT scan showed the obvious increase of density in the solid component,capsule wall,and separation of the mass. Meanwhile,the curved blood vessels in the mass were also found,the density of cystic component was not enhanced. The enhanced CT of retroperitoneal paraganglioma showed the typical characteristics of enhanced solid component and cystic changes for its qualitative diagnosis,combination with the accurate diagnosis of pre-operation could prevent the occurrence of complications after retroperitoneal paraganglioma operation. Conclusion The CT manifestations of retroperitoneal paraganglioma presents specific characteristics,distinct enhancement of the solid component and cystic change have the value for the qualitative diagnosis,the accurate diagnosis before operation can reduce the occurrence of complications.