颅内海绵状血管瘤的CT和MRI诊断

目的:探讨脑内与脑外海绵状血管瘤的CT和MRI表现及诊断价值.方法:搜集45例颅内海绵状血管瘤的CT和MRI影像资料进行分析,MRI检查45例,CT检查30例,其中脑内型海绵状血管瘤42例,脑外型海绵状血管瘤3例,均经手术病理证实.结果:脑内型海绵状血管瘤可位于脑内任何部位,单发病灶多见,无明显占位效应,周围无或轻度水肿.CT检查的全部病例呈稍高及混杂密度影27例,增强扫描大都无强化;MRI检查T2 WI表现为"桑葚状"混杂高信号,周围有云絮状低信号环,增强后病灶仅少数轻度强化.脑外型病灶位于中颅窝鞍旁,MRI呈类似哑铃形或类圆形较均匀的稍长T1明显长T2信号,增强扫描呈明显均匀强化.结论:脑内与脑外型海绵状血管瘤的CT和MRI表现具有一定特征,MRI优于CT像,特别是MRI的T2 WI像有助于明确诊断.

Intracranial Cavernous Hemangioma: CT and MRI Diagnosis

Objective:To investigate the imaging features and value of CT and diagnostic MRI in the diagnosis of intra- and extracerebral cavernous hemangioma.Mathods:CT and MRI data of 45 cases of intracerebral and extracerebral cavernous hemangioma were studied retrospectively.45 cases were performed MRI,and 30 cases of CT.There were 42 cases of intracerebral cavernous hemangioma and 3 extracerebral cavernous hemangiomas,all cases were confirmed pathologicaly.Results:The lesions of intracerebral cavernous hemangioma could be located in any position of the brain,single lesion was more commom.Most lesions had no or slightly edema without mass effect.CT features of 27 cases included:slightly higher or mixed density mass without contrast enhancement.MRI features on T2WI were mulberry-like inhomogenous high signal intensity with flocculent hypointensity ring.Only few lesions were slightly enhancement.Extracerebral cavernous hemangioma were located in the middle fossa and parasellae,dumbbell shape,and homogenous slight hypointensity on T1WI and hyperintensity on T2WI images with markedly enhancement.Conclusion:The CT and MRI findings of intracerebral and extracerebral cavernous hemangioma are specific,MRI is superior to CT,especially the T2WI image is important significance for diagnosis.