腹膜后副神经节瘤的MSCT表现

MSCT manifestations of retroperitoneal paraganglioma

目的探讨腹膜后副神经节瘤(PGL)的多层螺旋CT(MSCT)表现。方法回顾性分析2012年1月至2018年12月在郑州大学第一附属医院经病手术理证实为腹膜后PGL的25例患者的MSCT影像及临床资料。其中无功能性腹膜后PGL9例,功能性腹膜后PGL16例。观察腹膜后PGL的MSCT表现。结果25例腹膜后PGL患者肿瘤长径为(58.69±35.17)mm。21例位于右侧,4例位于左侧。平扫显示:实性成分CT值(39.92±8.00)HU.3例密度均匀,22例密度不均,主要表现为片状囊性低密度影。动脉期肿瘤实性成分均有明显强化,CT值(104.6±31.48)HU,静脉期21例持续强化,4例强化程度稍下降。无功能腹膜后PGL长径为(65.33±56.42)mm,较功能性腹膜后PGL长径[(54.52±15.82)mm]长,差异有统计学意义(t=2.52,P=0.028),平扫及增强结果差异比较未见统计学意义(P>0.05)。结论腹膜后无功能性腹膜后PGL与功能性腹膜后PGL的MSCT平扫及增强表现具有一致性。腹膜后副神经节瘤的CT表现可对瘤体作出准确的定位及初步的定性诊断。

Objective To investigate the multi-detector CT(MSCT)manifestations of retroperitoneal paragangliomas(PGL).Methods MSCT images and clinical data of 25 patients with PGL confirmed by pathology in the First Affiliated Hospital of Zhengzhou University from January 2012 to December 2018 were retrospectively analyzed.Among them,there were 9 cases of nonfunctional retroperitoneal PGL and 16 cases of functional retroperitoneal PGL.The MSCT manifestations of retroperitoneal PGL were observed.Results The diameter of the tumors were(58.69±35.17)mm.Twenty-one cases were located on the right side and 4 cases on the left side.Plain scan showed that the CT value of solid component was(39.92±8.00)HU.The density was uniform in 3 cases,and uneven in 22 cases,mainly with lamellar cystic low density shadow.The solid components of the tumors in arterial phase were significantly enhanced,the CT value was(104.6±31.48)HU;the enhancement in venous phase was sustained in 21 cases,and the enhancement degree in 4 cases decreased slightly.The diameter of nonfunctional retroperitoneal PGL was(65.33±56.42)mm,which was longer than the(54.52±15.82)mm of functional retroperitoneal PGL,and the difference was significant(t=2.52,P=0.028).There was no significant difference in plain scan or enhancement results(P>0.05).Conclusions Retroperitoneal nonfunctional PGL is consistent with functional PGL in MSCT plain scan and enhancement.CT findings of retroperitoneal PGL can provide accurate localization and preliminary qualitative diagnosis of the tumor.