CT manifestations of retroperitoneal extra-adrenal paraganglioma
10.3969/j.issn.1002-1671.2017.07.013
- VernacularTitle:腹膜后肾上腺外副神经节瘤的CT诊断
- Author:
Gangfeng LI
;
Yuchuan HU
;
Yong JING
;
Shijun DUAN
;
Guangbin CUI
- Keywords:
paraganglioma;
retroperitoneal;
computed tomography
- From:
Journal of Practical Radiology
2017;33(7):1033-1036
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the CT characteristics of retroperitoneal extra-adrenal paraganglioma(PGL).Methods CT findings of 11 patients with pathologically confirmed retroperitoneal extra-adrenal PGL were analyzed retrospectively,and the relevant literature was reviewed.All patients received plain CT as well as contrast-enhancement CT scan.Results All of the 11 tumors were located in the retroperitoneal space around large blood vessels,including 2 functional and 9 unfunctional extra-adrenal paragangliomas.Eight of 11 cases were benign tumors which presented as round or oval masses with sharp margins,separated from surrounding structures clearly;while the rest 3 cases,which with indistinct edge,even more with the invasion of surrounding structures (renal artery,renal venous and pancreas),were confirmed to be malignant.Most of the tumors were heterogeneous on plain CT.It was common to see intratumoral necrosis or cystic degeneration in the tumors (9 cases),while hemorrhage or calcification was uncommon,which was found in 3 and 2 cases,respectively.Homogeneous intensity was only observed in 2 masses with diameter less than 4 cm.On contrast-enhanced CT image, the solid part of the tumors presented continuously significant enhancement.Dilated feeding artery was found in or around the masses (8 cases) in artery phase.Conclusion There are certain characteristics of retroperitoneal extra-adrenal paraganglioma on CT scanning, which are helpful for preoperative diagnosis and treatment of this disease.
