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- 男39岁，矢状窦顶枕部软脑膜病变
The photos show features of "arachnoid granulation" - polypoid protrusions of leptomeninges into superior sagittal dural sinus that serve to channel the return of CSF to systemic venous circulation. They can sometimes appear quite prominent in some people, but are completely normal. The diagram below shows their anatomic location.
聞道有先後,術業有專攻
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agree.
dok
以下是引用mjma在2008-4-4 21:46:00的发言：
The photos show features of "arachnoid granulation" - polypoid protrusions of leptomeninges into superior sagittal dural sinus that serve to channel the return of CSF to systemic venous circulation. They can sometimes appear quite prominent in some people, but are completely normal. The diagram below shows their anatomic location.
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本帖最后由 于 2008-04-05 22:52:00 编辑
这一回真正体会到百闻不如一见啊。尽管书上见到蛛网膜粒的讲解，可就是不知道实际中可能是什么样的结构，所以一定要有老师的指点。谢谢马老师、力刀老师、瑶桐老师和各位关注过本贴的老师和同道！各位老师的发言对我帮助很大，谢谢！
再给大家转贴华子老师的回复内容，与大家分享：“又查一些文献，蛛网膜颗粒由细蒂、体及顶组成，顶部表面有蛛网膜细胞，体部有胶原轴心并有腔隙引流CSF入上矢状窦。人类蛛膜颗粒可较大，并被MR扫描显示。”
再请问：书上说的是脑脊液经由蛛网膜粒入静脉窦，可是那个图上看，似乎间质都是粉染的胶原样的物质，不影响脑脊液的流通吗？MJMA老师的看法：With age these arachnoid granulations get fibrotic and lose their efficiency as transporters, which may be why they are so prominent in your case. The efficient arachnoid granulations may be less prominent. This is my speculation and not based on any research evidence, of course.
再次感谢马老师！感谢华子老师！
- “人生没有彩排，每一天都是现场直播”
