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机构地区:[1]河南省直第三人民医院放射科,河南郑州450007 [2]郑州大学第一附属医院磁共振科,河南郑州450052
出 处:《中国CT和MRI杂志》2013年第1期17-18,2,共2页Chinese Journal of CT and MRI
摘 要:目的探讨成人颅内原始神经外胚层肿瘤(primitive neuroectodermal tumors,PNET)的MRI特征,以期提高对该病的认识。方法回顾性分析了7例经手术和病理证实的颅内PNET的MRI表现,并与手术、病理相对照。结果肿瘤多位于侧脑室旁额颞顶叶,浸润性生长,MRI上肿瘤较大,边界较清楚,瘤周水肿轻微;平扫呈不均匀较低T1、等或高T2信号,内部常伴有囊变和坏死区,多位于病灶边缘,可有出血;增强扫描7例肿瘤实质部分有明显的不均一强化。结论颅内PNET的MRI表现有一定特点;MRI有助于该病的诊断和指导治疗。Objective To evaluate MRI features of intracranial primitive neuroectodermal tumors (PNET). Methods The MRI features of 7 cases with intracranial PNET which were diagnosed by pathology were retrospectively analyzed and evaluated. Results The tumor masses were most commonly found in frontal, parietal, temporal and occipital lobe aside lateral ventricluars, and grew invasively. The tumors were large, with clear margin and slight edema. The tumors showed inhomogenous low TI, and equal or high T2 signal intensity, and the edge of tumors always had cystic degeneration, necrosis and hemorrhage. Tumors of 7 cases showed homogenous enhancement in enhanced scanning. Conclusion MRI manifestations of intracranial primitive neuroecto- dermal tumors have certain features; MRI is helpful to the diagnosis and treatment of this disease.
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