The cavernous sinus is a "lake" where many veins of the brain drain blood into. There are two such structures in the human brain (approximately behind each eye). These venous structures have walls and have nerves that run through them. When these lakes become involved with tumors, patient's can have dysfunction of these nerves (diploplia, facial sensation changes, and eye pain / visual loss).
31 year experience in Neurosurgery
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