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ethmoid bone |
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ethmoid bone
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| Ethmoid sinuses are on either side of your nose but further back in your skull. 1,2) In the normal anatomic situation, the secretions then empty into the ethmoid infundibulum and pass through the hiatus semilunaris into the middle meatus, then along the lateral nasal wall and over the inferior turbinate posteriorly into the nasopharynx. Frontal sinusitis occurs from the inflammation of either frontal or ethmoid sinuses. |
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