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Anatomy
All except one are true regarding cavernous sinus
Cavernous sinus roof is formed by meningeal layer of duramater, and floor is formed by endosteal layer of duramater.
It is an unpaired venous sinus.
3rd and 4th cranial nerve and internal carotid artery pierce roof of cavernous sinus
Abducens nerve passes through the cavernous sinus.
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