ethmoid cells

(redirected from ethmoidal sinuses)

eth·moid cells

ethmoidal air cells; evaginations of the mucous membrane of the middle and superior meatus of the nasal cavity into the ethmoidal labyrinth forming multiple small paranasal sinuses; they are subdivided into anterior, middle and posterior ethmoidal sinuses. See: anterior ethmoidal cells, middle ethmoidal cells, posterior ethmoidal cells.

ethmoid cells

paranasal sinuses occurring in groups within the ethmoid bone and communicating with the ethmoidal infundibulum and bulla and the superior and highest meatus. They are often subdivided into anterior, middle, and posterior ethmoid cells, groups of air cells named according to where they open into the nasal meatus. Also called ethmoid sinuses. Compare frontal sinus, maxillary sinus, sphenoidal sinus.

eth·moid cells

(ethmoyd selz)
Evaginations of the mucous membrane of the middle and superior meatus of the nasal cavity into the ethmoidal labyrinth forming multiple small paranasal sinuses.

eth·moid cells

(ethmoyd selz)
Ethmoidal air cells; evaginations of mucous membrane of middle and superior meatus of nasal cavity into ethmoidal labyrinth forming multiple small paranasal sinuses; subdivided into anterior, middle and posterior ethmoidal sinuses.
See: anterior ethmoidal cells
Synonym(s): ethmoidal sinuses.
References in periodicals archive ?
5% of bilateral disease with involvement of maxillary and ethmoidal sinuses.
They are most likely to be seen in the frontal and ethmoidal sinuses and less frequently--in the maxillary and sphenoidal sinuses.
Considering each sinus separately, the lowest sensitivities were for the left maxillary sinus and right ethmoidal sinus (48 and 50%, respectively); the lowest specificities were for the ethmoidal sinuses (78 and 84%, respectively), whereas the specificity of all other sinuses was above 90%.
The normal mucociliary clearance in which the anterior group of sinuses like frontal, maxillary, and anterior ethmoidal sinuses drain along the anterior and inferior part of pharyngeal end of Eustachian tube.
highlighted the greater risk of optic neuropathy and poor visual outcome with sphenoid sinus, and fronto-ethmoidal mucoceles especially with the involvement of the posterior ethmoidal sinuses.
CT scan with contrast of the paranasal sinus showed a homogenous soft tissue density in the region of the middle meatus extending medially to the septum, superiorly to the skull base, posteriorly to ethmoidal sinuses, laterally breeching the lamina papyraceae of the orbit, contrast enhancement was seen in this lesion (Figure 2).
There is compensatory thickening of skull vault with enlargement of left frontal and ethmoidal sinuses, enlarged left mastoid air cells with elevation of petrous part of left temporal bone.
CT scan PNS showed pus in the left upper lid, pus in the left ethmoidal sinuses and the left eyeball was pushed anterolaterally (Fig.
The pathophysiology of fronto-ethmoid mucoceles has been lightened in experimental studies and by clinical observations that the trapped mucosa in the frontal and ethmoidal sinuses after obstruction of sinus ostia (8).