血管母细胞瘤MRI诊断

目的：进一步提高对血管母细胞瘤ＭＲＩ表现的认识。方法：搜集经手术病理证实的血管母细胞瘤４３例，对其ＭＲＩ表现进行回顾性分析。结果：血管母细胞瘤常位于小脑半球及蚓部，其它部位少见。可多发和伴发腹部脏器病变。大囊小结节征是囊型血管母细胞瘤的特征表现，其ＭＲＩ信号在平扫各加权像上均高于脑脊液信号；实质型信号强度在Ｔ２ 加权像上随ＴＥ时间延长而升高，瘤内及周围可见血管流空信号。增强扫描有助于病灶的检出和定性诊断。结论：ＭＲＩ是诊断血管母细胞瘤的有效检查方法，但需与囊型胶质瘤、单纯囊肿、脑膜瘤、ＡＶＭ 等鉴别。

MRI Diagnosis of Hemangioblastoma

Objective:To further raise the knowledge of MRI manifestation of hemangioblastomas.Methods:The MRI appearances of forty-three cases of hemangioblastomas proved by surgery and pathology were analyzed.Results:Hemangioblastomas were often located in hemispherium cerebelli and vermis cerebelli,other parts of brain were rare.It may be multiple and coexist abdominal diseases.The large cyst and small tubercle sign were characteristic manifestations of the cyst type hemangioblastomas and its MRI signals were high than that of cerebrospinal fluid on all weighted image(WI)of ordinary scanning.Signal intensity of the essence type was higher with the TE time to lengthened on T 2WI.It can be appeared blood vessel flow-void-sognm within and around the tumor.contrast-enhaned scan was helpful in detecting the lesions and qualitative diagnosis of diseases.Conclusion:MRI is a effective method in diagnosing hemangioblastomas.Hemangioblastomas should be differentiated from cyst type glioma,simple cyst,meningioma and arterovenous aneurysm(AVM).