脑内海绵状血管瘤的CT和MRI诊断

CT and MRI diagnosis of cerebral cavernous anginoma

目的探讨脑实质内海绵状血管瘤(CA)的CT、MRI表现及其诊断价值。方法回顾性分析经手术病理证实的CA12例,8例行CT平扫,4例行CT增强扫描,12例均行MR检查,5例行Gd-DTPA增强扫描。结果12例CA共检出14个病灶。CA可发生于脑内任何部位,单发多见(10/12)。海绵状血管瘤CT平扫表现为类圆形高或稍高密度病灶,多数为不均匀,常伴钙化、出血。MRI平扫大部分表现为T1WI呈等信号或稍高信号,T2WI呈高、低混杂信号,11个病灶周围可见低信号环影,大多数病灶周围无水肿带及占位效应。CT和MRI增强后均呈轻度强化或无明显强化。结论CT和MRI检查对CA具有重要的诊断价值,MRI优于CT,是诊断本疾病最佳的影像学方法。

Objectlve To explore CT and MRI features and their diagnostic value of cerebral cavernous angioma. Methods Twelve patients with pathologically proved cerebral cavernous angioma were collected. And their imaging findings, including plain CT（ n = 8 ）, enhanced CT（ n = 4 ）, plain MRI （ n = 12 ） and Gd - DTPA enhanced MRI （ n = 5） ,were retrospectively analyzed. Results Fourteen lesions were detected in 12 cases on plain CT scans and plain MRI. Most cerebral cavernous angioma was single （10/12,83%） and could occurre at any site in the brain, which presented analognous round with slightly high density or high density on plain CT. Most of them weren＇t average ,and often companied with calcification and hemorrhage. On plain MRI, most lesions displayed iso - intense or slightly high - intense signal on T1WI, while all lesions displayed mixed signal on T2 WI. 11 lesions displayed ringlike low -signal, neither perifocal edema nor space - occupying effect was present in most cases. After administration of contrast media, the lesions had no enhancement or slight enhancement. Conclusions Both CT and MRI are of great value in the diagnosis of the disease, and MRI is superior to CT in displaying the lesions. MRI is the best method for diagnosis of cerebral cavernous angioma.