ethmoid cells


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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 ?
We also measured the length of the superior and posterior extensions of the overriding ethmoid cell in relation to the anterior wall of the sphenoid sinus.
An overriding ethmoid cell was found in only 14 specimens, which accounted for 21.
Ariyurek et al studied 52 patients with normally aerated posterior ethmoid cells who underwent CT examination prior to endoscopic sinus surgery.
The anterior and posterior ethmoid cells are defined by and separated by the basal lamella of the middle turbinate.
However, computed tomography (CT) identified a homogenously enhancing soft-tissue density that involved the right middle and posterior ethmoid cells and the entire sphenoid sinus.
We performed a right uncinectomy, removed the anterior ethmoid cells, and perforated the ground lamella in order to approach the posterior ethmoids, which were filled with the soft, smooth mass.
3) The anterior and middle ethmoid cells begin as evaginations from the nasal cavity into the middle meatus at about the third month of fetal development.