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。
Objective To investigate the imaging manifestations and diagnostic characteristics of peripheral primitive neuroec- todermal tumor （pPNET） in kidney. Methods The clinical, ultrasonographic, CT and pathological features in 4 cases with pP- NET in kidney proved by operative and pathological results were reviewed retrospectively. Results The ultrasonograghic appear- ance of the tumors showed a hybrid echo-mass with irregular echo free zone inside, and most of the tumors were detected blood flow signal without high resistance index （RI） ; the CT appearance of the tumors showed large cyst-solid mixed soft tissue masses with capsules, and the inside of the tumors showed some separation structures and a small amount of blood and calcifications. In CT dynamic enhancement, the solid component of the tumors showed slight enhancement in arterial phase and still slight enhance- ment in delay phases, the liquid area always showed no enhancement, but the separation structures were enhanced slightly. In some cases, there were emboli in renal veins or inferior cava veins. Conclusion The pPNET formed in kidney has no characteris- tic manifestations in ultrasonography, however, it has some on CT scan. CT can detect the internal structures and the extent of the tumor, identify whether there is some distant metastasizes, and provide reference value to the establishment of surgical operation and the assessment of response to treatment.
出处
《医学影像学杂志》
2016年第9期1672-1675,共4页
Journal of Medical Imaging
关键词
原始神经外胚层肿瘤
肾脏
体层摄影术
X线计算机
Peripheral primitive neuroectodermal tumor
Kidney
Tomography, X-rya computed
