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.

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 ?
Type 1 frontal recess cell (Fig 1): They are defined as single anterior ethmoid cells within the frontal recess sitting above the agger nasi cell.
Onodi cells (FIG 10) are ethmoid cells that have migrated to the anterior region of the sphenoid sinus, with anterosuperior location, and intimately related to the optic nerve, causing optic neuropathy in case of certain conditions that affect such cells (27).
Ariyurek et al studied 52 patients with normally aerated posterior ethmoid cells who underwent CT examination prior to endoscopic sinus surgery.
As the dissection progressed, both of these ostia were found to open into the posterior ethmoid cells.
Partial multiphase skeletal scintigraphy and single-photon emission CT of the cranium showed increased bone metabolism in the area of the right frontal bone, starting in the ethmoid cells in the roof of the orbit and extending slightly to the left (figure 2).
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.
(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.
The most anterior of the ethmoid cells, the agger nasi cell is also the first to pneumatize in the newborn, and it is quite prominent throughout childhood.
Dissection of the left posterior ethmoid cells revealed the presence of a superior Onodi cell (sphenoethmoid cell) above the sphenoid sinus (figure, B).
The anterior ethmoid artery, a branch of the ophthalmic artery, leaves the orbit via the anterior ethmoid foramen, crosses the roof of the anterior ethmoid sinus, and supplies the anterior ethmoid cells and frontal sinus (figure, A).