松果体区生殖细胞瘤扩散的MRI研究  

MRI study on the diffusion of pineal region germinoma

作　　者：韩仰同[1] 戴建平[2] 

机构地区：[1]北京积水潭医院神经科,北京100035 [2]北京市神经外科研究所神经影像中心,北京100050

出　　处：《中国医学影像技术》2006年第10期1558-1560,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的分析松果体区生殖细胞瘤扩散的途径和MRI表现。方法24例松果体区生殖细胞瘤均经手术和病理证实,其中13例经临床和诊断性放疗证实为松果体区生殖细胞瘤的扩散。结果16例沿脑脊液(CSF)种植;9例沿室管膜下扩散;13例向邻近脑组织浸润蔓延。侧脑室旁扩散为等T1长T2或稍长T2,多个结节或连接成片;小脑幕、大脑镰和软脑膜扩散多表现为“绳索”样增粗,也可为多个或单个结节;环池、第4脑室和小脑上蚓池多为强化结节。除3例透明隔和1例脊髓马尾瘤灶外,MRI均显著均匀强化。结论扩散除具有恶性肿瘤扩散的共性———直接浸润蔓延和沿CSF种植外,还可沿室管膜下扩散,MRI增强扫描可清楚显示多发的和较小的转移灶。Objective To study the pathway and MRI features of the diffusion about pineal region germinoma. Methods Twenty-four pineal region germinomas were confirmed by operation and pathology and 13 of them with diffusion were confirmed by clinics and diagnostie radiotherapy. All cases had MR enhancement. Results There were 16 cases metastasizing through cerebrospinal fluid eyele, 9 cases diffusion through subependyma, and 13 cases invading cerebral tissue. Different metastatis lesions had different MRI features. Cases except for 3 metastatic lesions on the septum pellucidum and cauda equina had homogeneous and evident enhancemet. Conclusion Because of its special location, the diffusion of pineal region germinoma not only has common ground of malignant tumors, but also has special characters. MR enhancement imaging can clearly show small and multiple metastatic lesions. It was important for the option of therapeutic methods and improvement on patient＇s survival quality if the diagnostic information can be detected on MR imaging.

关 键 词：松果体 生殖细胞瘤 扩散 磁共振成像 

分 类 号：R739.4[医药卫生—肿瘤] R445.2[医药卫生—临床医学]