颅内少见部位胆脂瘤的MRI诊断

发布时间：2018-09-01 13:52

【摘要】：目的探讨颅内少见部位胆脂瘤的MRI表现特征。提高该病的术前诊断率,减少误诊率。方法回顾性分析经手术病理证实的6例颅内胆脂瘤的MRI表现,采用Siemens 3.0 T Skyra磁共振仪,均行平扫及增强扫描,1例加扫磁敏感加权成像(SWI)序列。结果本组病例均为单发,枕大孔区1例,左侧中颅窝2例,右侧中颅窝1例,左侧枕叶脑实质2例。病灶范围较大,周边分叶状,灶周未见水肿,部分病灶沿阻力小的地方生长明显。5例T1WI、T2WI、T2FLAIR序列信号混杂,DWI序列以高信号为主的混杂信号,其中枕大孔区病例信号较为特殊,T1WI呈高信号,T2WI、T2FLAIR序列呈低信号,DWI为低信号,SWI序列最大强度投影(MIP)为稍高信号,相位(PHASE)图为等信号。结论颅内少见部位胆脂瘤MRI表现具有特征性,可以做到术前定性诊断。
[Abstract]:Objective to investigate the MRI features of cholesteatoma in rare intracranial location. To improve the preoperative diagnosis rate and reduce the misdiagnosis rate. Methods the MRI findings of 6 cases of intracranial cholesteatoma proved by operation and pathology were retrospectively analyzed. Siemens 3.0T Skyra magnetic resonance imaging was performed in all cases with plain scan and enhanced magnetic sensitivity weighted imaging (SWI). Results all the patients were single, 1 case in the foramen magnum region, 2 cases in the left middle cranial fossa, 1 case in the right middle cranial fossa and 2 cases in the left occipital lobe brain parenchyma. The lesion was large in size, lobular around, edema was not seen in the periphery, and some lesions grew obviously along the site of low resistance. The signal intensity of T1WIT T2WII T2FLAIR sequence was mixed with that of DWI sequence, and the signal intensity was mainly high signal intensity on DWI sequence. In the occipital foramen region, the signal intensity was more special on T _ 1WI. The signal intensity of T _ 2W _ I T _ 2FLAIR sequence was low signal and the maximum intensity projection (MIP) was slightly high signal, and the phase (PHASE) image was equal signal. Conclusion the MRI features of cholesteatoma in rare intracranial location are characteristic and can be diagnosed qualitatively before operation.
【作者单位】：青海省人民医院磁共振室;
【分类号】：R739.41;R445.2

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