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Sphenoidal Sinus
Respiratory System

Sphenoidal Sinus

Sinus sphenoideus

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The sphenoid sinuses are two large irregular cavities within the sphenoid bone separated by a septum.

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Related parts of the anatomy

Key Features/Anatomical Relations

The sphenoid sinuses open into the corresponding sphenoethmoidal recesses. The sinuses are located inferior to the sella turcica, which houses the pituitary gland, and medial to the cavernous sinuses and internal carotid arteries


The sphenoid sinuses contribute to adding resonance to the voice and decreasing the overall weight of the skull.

List of Clinical Correlates

- Sinusitis

- Endoscopic transsphenoidal surgical approach to the pituitary gland

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Sphenoidal Sinus

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The sphenoidal sinuses are contained within the body of the sphenoid bone beneath the sella turcica.

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