不同途径脑膜转移瘤的MRI分析  

MRI analysis for different routing meningeal metastasis

作　　者：张贵祥[1] 徐朝霞[1] 韩月东[1] 刘艳丽[1] 刘满生[1] 常英娟[1] 赵海涛[1] 

机构地区：[1]西安第四军医大学西京医院影像科,710032

出　　处：《中华放射学杂志》2001年第1期17-20,共4页Chinese Journal of Radiology

摘　　要：目的　回顾性分析经手术及病理证实的 5 9例不同途径脑膜转移瘤的MRI表现及诊断作用。方法　 5 9例病人 ,男 42例 ,女 17例 ;年龄 17～ 6 5岁。其中血源性脑膜转移 2 4例 ,邻近肿瘤直接侵犯脑膜 2 9例 ,颅内肿瘤经脑脊液播散 6例。 5 9例脑膜转移均经平扫及注射钆喷替酸葡甲胺 (Gd DTPA)后扫描。结果　血源性脑膜转移主要表现为硬脑膜 蛛网膜或软脑膜 蛛网膜的增厚或结节 ,肿瘤直接侵犯脑膜均表现为肿瘤向远端延伸的由粗变细的类似“靶征”或“鼠尾征” ,经脑脊液播散的脑膜转移均为沿脑蛛网膜下腔或室管膜下大小不等的结节灶。MRI平扫阳性 :结节型 12例 ,线状增厚型 11例 ,混合型 6例。增强扫描均有较明显的强化。结论　MRI是检出脑膜转移瘤的重要方法 。Objective To retrospectively analyze MRI appearances of meningeal metastasis from different routs in 59 patients proved by operation or pathology. Methods Fifty nine patients including 42 males and 17 females, aged 17-65 years, were studied. 24 hematogenous, 29 direct invasion, and 6 CSF dissemination metastatic cases were examined with and without enhancement MR examination. Results Hematogenous metastasis showed diffuse thickening or nodular pattern in the dural arachnoid or pia arachnoid. Invasion from adjacent intra or extra axial tumor demonstrated meningeal thickening and off towards periphery just like “tail of mouse” or “target signs”. CSF dissemination of intra axial tumor showed subarachnoid space or subependymal diffuse thickening and nodular pattern. Positive of MRI plain scan were as follows: nodular pattern 12 cases, linar thickening pattern 11 cases, and mixed pattern 6 cases. All metastasis showed marked enhancement. Conclusion MRI was an important tool for detecting meningeal metastasis and post contrast MR scan must be performed in suspicious cases.

关 键 词：脑膜肿瘤 肿瘤 磁共振成像 脑膜瘤 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.4[医药卫生—诊断学]