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Sphenoid Sinus
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Sphenoid Sinus: A midline air sinus behind the nasal cavity and in front of the sella turcica and clivus and below the frontal fossa and frontal lobes. The other paranasal sinuses include the ethmoid and maxillary sinuses which are all lined with mucous-secreting cells. The sphenoid sinus is the sinus through which endonasal transsphenoidal surgery is performed. Learn more.
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