肾脏外周型原始神经外胚层肿瘤影像诊断

发布时间：2018-08-26 08:15

【摘要】：目的探讨肾脏外周型原始神经外胚层肿瘤(peripheral primitive neuroectodermal tumor,p PNET)的影像学表现及诊断特征。方法回顾分析4例经术后病理证实的发生于肾脏的p PNET的临床表现、超声征象、CT征象及其病理表现。结果肿瘤声像图均表现为混合回声团块,伴有不规则无回声区,大部分瘤内可探及血流信号,阻力指数(RI)不高;CT图像肿瘤均表现为体积较大的、有包膜的囊实性软组织肿块,内部可见分隔,可有少量出血及钙化,增强扫描,动脉期病变实性成分轻度强化,静脉期及排泌期轻度延迟强化,其中液性成分始终无强化,分隔轻度强化。肾静脉或下腔静脉内可见大小不等栓子。结论肾脏外周型原始神经外胚层肿瘤超声检查无明显特征性表现,而CT表现有一定的特征性,能较好的显示肿瘤的内部结构、明确肿瘤的范围及有无远处转移,对手术的制定及治疗效果的评价有重要的参考价值。
[Abstract]:Objective to investigate the imaging features and diagnostic features of peripheral primitive neuroectodermal tumors (peripheral primitive neuroectodermal tumor,p PNET) of the kidney. Methods the clinical manifestations, CT findings and pathological findings of 4 cases of p PNET confirmed pathologically in kidney were retrospectively analyzed. Results all the tumors showed mixed echo mass with irregular non-echoic area. The blood flow signals could be detected in most tumors. The tumors on CT images with low resistive index (RI) showed large cystic and solid soft tissue masses with capsule. There were a few bleeding and calcification, enhanced scanning, slight enhancement of solid components in arterial phase, slight delayed enhancement in venous phase and excretion stage, in which liquid components were not enhanced and septal enhancement was slight. The renal vein or inferior vena cava can be seen in variously sized emboli. Conclusion Ultrasonic examination of peripheral primitive neuroectodermal tumors of kidney has no obvious characteristic, but CT has some characteristics, which can better display the internal structure of the tumor, determine the range of the tumor and whether there is distant metastasis. It has important reference value for the establishment of operation and the evaluation of therapeutic effect.
【作者单位】：山东省巨野县人民医院放射科;南京医科大学第一附属医院放射科;
【分类号】：R737.11;R730.44

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