ethmoid sinus

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Related to Ethmoidal air cells: ethmoidal sinuses
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Noun1.ethmoid sinus - a sinus of the meatuses of the nasal cavity (behind the bridge of the nose)
sinus - any of various air-filled cavities especially in the bones of the skull
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References in periodicals archive ?
Imaging, which included CT brain, MRI brain, and CT sinuses, demonstrated hyperdense soft-tissue opacification of the right frontal, sphenoid sinuses, and ethmoidal air cells with corresponding decreased T2 signal and osseous erosive changes involving medial orbital wall with soft tissue extending to the orbital apex.
[4] Bolger et al reported this pneumatisation in 53% of the sinus patients, as an extension of the anterior air cells (55%) or posterior (45%) ethmoidal air cells.
A CT scan revealed a large right maxillary antral mass, with areas of radiolucency and radiopacity, extending into the right nasal cavity and ethmoidal air cells (Fig.
Active secretion of contrast through the defect in the right cribriform plate defect into the middle ethmoidal air cells was noticed with a small amount of contrast pooling in right nasal cavity.