摘要
目的探讨腹膜后原始神经外胚层肿瘤(primitive neuroectodermal tumors,PNET)的CT及血管造影表现。资料与方法回顾性分析6例经病理证实的腹膜后PNET的CT和血管造影表现。结果 6例中,5例行CT平扫和增强扫描,CT平扫1例,血管造影4例。CT表现为腹膜后较大囊实性软组织肿块,最大直径约17.0 cm,边界清晰或不清,形态规则或不规则,呈浸润性或膨胀性生长;平扫肿块密度不均,CT值约14～47 HU,3例示不同程度坏死囊变,2例可见小片状出血灶,1例可见钙化灶。增强扫描肿块呈轻中度不均匀强化,CT值升高约13～25 HU。肿块包绕肾血管2例,累及肾脏并肾血管受压移位4例,肾盂积水4例,累及左肾上腺2例、胰腺1例、左侧腰大肌2例、左侧膈肌1例、左侧输尿管1例。3例可见患侧肾脏出现2支肾动脉,2例腹膜后可见多发淋巴结肿大,1例双侧膈脚后及左颈部淋巴结肿大。3例血管造影显示病灶血供不丰富,1例显示病灶呈团块状肿瘤染色征。结论腹膜后PNET的CT和血管造影表现缺乏特异性,与腹膜后其他恶性肿瘤不易鉴别。
Objective To study the CT and angiography features of retroperitoneal primitive neuroectodermal tumors（PNET）.Materials and Methods The CT and angiography appearances of 6 patients with PNET pathologically proved were analyzed retrospectively.Results Imaging data included plain and enhanced CT in 5 patients,plain CT in 1,and angiography in 4.CT images showed large solid-cystic mass in the retroperitoneum,with the maximum diameter of 17.0 cm.The tumors showed regular or irregular shape with well-defined or ill defined margins,with invasive growth or expansive growth.On plain CT,the tumors showed heterogeneous density with the CT value of 14-47 HU.Different cystic and necrotic portions within tumors were observed in 3 cases,intratumoral hemorrhage were seen in 2 and calcification was found in 1.On contrast CT images,the tumors displayed slight or moderate heterogeneous contrast enhancement and CT value increased 13-25 HU.2 cases of renal vessels were surrounded.The findings of kidney invasion and renal vessels displacement were observed in 4 cases,hydronephrosis in 4,the left adrenal gland infiltration in 2,pancreas involvement in 1,the left psoas muscle invaded in 2,the left diaphragm encroached in 1,the ureter involvement in 1.Two renal arteries in ipsilateral kidney were appeared in 3 patients.Multiple retroperitoneal lymph nodes were observed in 2 cases and bilateral diaphragmatic and left cervical lymph nodes were seen in 1 case.On angiography,a globular hypovascular mass was found in 3 cases and block tumor stain was seen in 1.Conclusion The CT and angiography features of retroperitoneal PNET lack of specificity,and hard to identify it with other malignent tumors in the retroperitoneum.
出处
《临床放射学杂志》
CSCD
北大核心
2011年第12期1779-1782,共4页
Journal of Clinical Radiology
