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*[http://en.wikipedia.org/wiki/File:Circle_of_Willis_en.svg Circle of Willis (WP)] . | *[http://en.wikipedia.org/wiki/File:Circle_of_Willis_en.svg Circle of Willis (WP)] . | ||
*[http://library.med.utah.edu/WebPath/HISTHTML/NEURANAT/CNS334A.html Interactive schematic (utah.edu)]. | *[http://library.med.utah.edu/WebPath/HISTHTML/NEURANAT/CNS334A.html Interactive schematic (utah.edu)]. | ||
===Meninges=== | |||
Deep to superficial: | |||
#Pia mater. | |||
#Arachanoid membrane. | |||
#*Subarachanoid space - contains blood vessels. | |||
#Dura mater. | |||
#*Tough outer covering. | |||
====Lesion location classification==== | |||
Locations:<ref>URL: [http://www.nervous-system-diseases.com/spine-tumor.html http://www.nervous-system-diseases.com/spine-tumor.html]. Accessed on: 21 September 2010.</ref> | |||
#Intra-axial = inside the (middle) of spinal cord/brain. | |||
#*[[AKA]] intramedullary. | |||
#Intradural = not intra-axial, but deep to the dural. | |||
#*[[AKA]] extramedullary. | |||
#Extradural = outside of dura. | |||
*The above descriptors are often found in radiology reports. | |||
====DDx based on location<ref>URL: [http://www.nervous-system-diseases.com/spine-tumor.html http://www.nervous-system-diseases.com/spine-tumor.html]. Accessed on: 21 September 2010.</ref>==== | |||
Intra-axial: | |||
* Glioma (astrocytoma, oligodendroglioma). | |||
* Hemangioblastoma. | |||
* Ependymoma. | |||
Intradural: | |||
* Meningioma. | |||
* Schwannoma. | |||
* Neurofibromas. | |||
* Arachnoid cyst. | |||
Extradural: | |||
* Mets (lung, breast, etc.). | |||
* Schwannoma. | |||
* Sarcoma. | |||
* Plasmacytoma. | |||
* Primary bone tumors - osteosarcoma, osteochondroma, chondrosarcoma. | |||
* Chordoma. | |||
==Normal histology== | ==Normal histology== |
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