脑实质内海绵状血管瘤的CT和MRI诊断

目的 探讨脑实质内海绵状血管瘤(CA)的CT和MRI表现，以提高对本病的认识。资料与方法 回顾性分析经手术病理证实的CAl4例。12例行CT平扫，10例行CT增强扫描；10例行MM检查，6例行Gd—DTPA增强扫描；9例同时行CT和MRI检查。结果 CA可发生于脑内任何部位，以单发病灶多见。12例CT平扫发现16个病灶，全部病灶均呈高密度或稍高密度，7个病灶可见钙化；10例CT增强扫描发现病灶14个，9个病灶无强化，5个病灶呈轻度强化。10例MRI检查发现13个病灶，3个在T1WI上是等信号，10个为高信号；在T2WI上全部病灶为高低混杂信号，其中9个病灶周围伴有环形低信号，大多数病灶周围无水肿带，无占位效应。结论 CA具有较典型的影像学表现，CT和MRI对病变的诊断具有重要意义，且MRI优于CT。正确诊断有赖于结合临床资料和影像学征象的综合分析。

CT and MRI Diagnosis of Cerebral Cavernous Hemangioma

Objective To discuss CT and MRI features of cerebral cavernous hemangioma, and to make a further understanding of the disease. Materials and Methods Fourteen patients with pathologically proved cerebral cavernous hemangioma were collected. Imaging findings, including plain CT (n=12), enhanced CT (n=10), plain MRI (n=10) and Gd DTPA enhanced MRI, were retrospectively analyzed.Results Most cerebral cavernous hemangioma was single (12/14, 85.7%) and occurred at any site in the brain. On plain CT scans, 16 lesions were detected in 12 cases, all presenting as high dense or slightly high dense shadows. Calcifications were seen in 7 lesions. On enhanced CT scans, 14 lesions were found in 10 cases, of which 9 showed no enhancement while 5 showed slight enhancement. MRI demonstrated 13 lesions in 10 cases, of which 3 displayed iso intense signal and 10 high intense signal on T 1WI, while all lesions displayed mixed signal on T 2WI. Nine lesions displayed ring like low signal, and neither perifocal edema nor space occupying effect was present in most cases.Conclusion Cerebral cavernous hemangioma carries characteristic imaging features. Both CT and MRI are of great value in the diagnosis of the disease and MRI is superior to CT in displaying the lesion. A combination of imaging findings with clinical data is necessary for making a correct diagnosis.