摘要
目的 探讨桥小脑角 (CPA)胆脂瘤的临床特点及影像学表现 ,提高诊断率。方法 回顾性分析11例经手术病理证实的CPA胆脂瘤的临床及影像学资料 (包括CT及MRI)。结果 肿瘤位于左侧CPA 6例 ,右侧CPA 5例。 9例以三叉神经痛为首发症状 ,8例表现Ⅴ、Ⅶ、Ⅷ颅神经损伤症状 ,4例表现小脑共济失调症状。CT扫描 :肿瘤边界清 ,瘤周水肿不明显。 7例为低密度 ,4例为混杂密度。肿瘤形态不规则 8例 ,类圆形 3例。 11例增强扫描 ,9例增强不明显 ,2例边缘强化。MRI表现 :7例行MRI检查 ,T1WI上 ,6例呈均匀性低信号 ,1例呈以低信号为主的混杂少许高信号改变。T2 WI上 ,5例呈略低于脑脊液的高信号 ,2例肿瘤信号等于脑脊液信号。 6例增强扫描中 ,5例无强化 ,1例边缘强化。结论 CPA胆脂瘤无特征性临床症状 ,易误诊。CT与MRI是诊断本病的有效方法 ,结合临床可提高本病的诊断率。
Objective To investigate the clinical features and imaging findings of cerebellopontine angle(CPA) epidermoid tumor in order to improve diagnosis.Methods The clinical features and imaging findings(included CT and MRI) in 11 cases with CPA epidermoid tumor proved by surgery and pathology were analyzed retrospectively.Results 6 cases were located in left CPA and 5 cases in right.Trigeminal neuralgia was the initial symptoms in 9 cases.8 cases showed disturbance of Ⅴ,Ⅶ and Ⅷ cranial nerves.3 cases showed cerebellar dystaxia symptoms.CT scanings:The tumors margin was clear and no perifocal edema.CT manifestations showed hypodense in 7 cases and isodensity in 4 cases.The tumors were irregular in 8 cases and ellipse shape in 3 cases.In the 11 cases administrated contrast medium,9 cases had no enhancement and 2 cases,rim enhancement.MRI findings:MRI were examined in 7 cases,6 cases exhibited low signal intensity on T 1WI,and slight high signal intensity in 1 case.On T 2WI,high signal intensity in 5 cases and isointensity in 2 cases with respect to cerebrospinal fluid(CSF) were demonstrated.In the 6 csaes administrated contrast medium,5 cases had no enhancement and 1 case rim enhancement.Attention should be paid in diagnosis because it is easily mistaken.Conclusion CPA epidermoid tumor are easily misktaken because of lack of specific manifestations.CT and MRI are major means of diagnosis for this disease.Combining clinical and imaging features can improve diagnostic rate.
出处
《中国基层医药》
CAS
2004年第3期278-279,共2页
Chinese Journal of Primary Medicine and Pharmacy
