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Ethmoid sinus

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The ethmoid sinus consists of 20 or so communicating air cells which lie between the two orbits. Nasal polyps originate from these air cells.

Important relations:

  • the lateral wall is formed by the lamina papyracea; it is very thin and may provide a route for sinus infection to involve the orbit

  • superiorly the ethmoid is related to the anterior cranial fossa and the cribriform plate

  • posteriorly the ethmoid is related to the optic nerve and apex of the orbit

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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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