脑内原始神经外胚层肿瘤的影像学表现  

IMAGING FINDINGS OF PRIMITIVE NEUROECTODERMAL TUMORS IN THE BRAIN

作　　者：于华龙[1] 丁慧[1] 胡亚彬[1] 徐文坚[1] 

机构地区：[1]青岛大学附属医院放射科,山东青岛266003

出　　处：《青岛大学医学院学报》2016年第4期435-438,共4页Acta Academiae Medicinae Qingdao Universitatis

摘　　要：目的探讨脑内原始神经外胚层肿瘤(PNET)的影像学特征,进一步提高对该疾病的影像学认识。方法对10例经手术、病理证实的脑内PNET的影像学资料进行回顾性分析。结果 PNET位于幕上7例,幕下3例。肿瘤体积较大,边界较清楚,瘤周水肿轻微。CT平扫肿瘤呈高密度,内部常伴有囊变、坏死、出血、钙化,边缘常见大囊变区。MR平扫肿瘤呈不均匀等或较低T1、等或高T2信号,高DWI信号;6例行MR增强扫描,其中5例呈明显的不均匀强化,1例轻度强化。10例中2例发生颅骨侵犯,2例术后复发并全身转移。结论脑内PNET的影像学表现呈现一定特征,影像学检查有助于其临床诊疗。Objective To explore the imaging features of intracranial primitive neuroectodermal tumors（PNET）,and improve the image understanding of the disease. Methods Imaging data of 10 cases of intracranial PNET confirmed by surgery and pathology were retrospectively analyzed. Results The lesions of the seven cases were located in supratentorial areas,and three cases under the screen.The lesions were large in volume with clear margin and mild peritumoral edema.CT scan showed high-density accompanied by cystic degeneration,necrosis,hemorrhage and calcification.MR scan showed uneven isointensity or hypointensity in T1 WI,hyperintensity in T2 WI,high DWI signal.MR enhanced scan was done in six cases,of which,five showed obvious uneven enhancement and one slightly enhanced.There were two cases of cranial invasion,and two of systemic metastasis and recurrence after surgery. Conclusion The imaging findings of intracranial primitive neuroectodermal tumors have certain characteristics.An imaging examination is helpful in the clinical diagnosis and treatment of this disease.

关 键 词：神经外胚瘤 原始 脑肿瘤 磁共振成像 体层摄影术 X线计算机 

分 类 号：R739.41[医药卫生—肿瘤]