蛛网膜的

例句：

1. 1. The MRI scan revealed a small tumor in the spinal cord.
   磁共振成像扫描显示脊髓中有一个小肿瘤。
2. 2. The patient was diagnosed with multiple sclerosis, which affects the spinal cord and brain.
   患者被诊断出患有多发性硬化症，这会影响脊髓和大脑。
3. 3. The surgery involved removing the tumor from the spinal cord.
   手术涉及从脊髓中移除肿瘤。