ethmoid sinus

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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 ?
KEY: Anterior (A); Posterior (P); Medial (M); Lateral (L); Optic Nerve (ON); Optic Chiasma (Ch); Internai Carotid Artery (ICA); Intersinus Septum (IS); Crista Galli (CG); Left Sphenoidal Sinus (LSS); Right Sphenoidal Sinus (RSS); Posterior Ethmoidal Cell (PEC); Ethmoidal Cells (ECs)
In this study, the AN cells were defined as the anterior ethmoidal cell pneumatized from the frontal recess, as previously defined by Messerklinger (4).
Frontal sinuses formation starts at two years old, but its pneumatization occurs only around 6-7 years old, because of the migration of the ethmoidal cell to the frontalis bone (PIGNATARY et al., 2004).
This is a posterolateral pneumatization of posterior ethmoidal cell coming into intimate relationship with optic nerve.
[12] The bulla was found to be the most constant ethmoidal cell and the key area for approaching either the anterior or the posterior group of air cells.
Onodi Cell: This is a posterolateral pneumatization of posterior ethmoidal cell coming into intimate relationship with optic nerve.
[11] Its size is an important factor when associated with opacification of anterior ethmoidal cells at CT in patients diagnosed with sinusopathy.
An intraorbital foreign body with triangular shape of 4.6 cm x 2 cm was seen in the left orbit, passing through the orbit and the ocular globe, fracturing the superomedial wall of the orbit, with a probable associated fracture of the ethmoidal cells, and reaching the anterior cranial fossa, causing pneumocephalus (Figures 1 and 2).
Paranasal sinus computerized tomography (CT) revealed a hypodense mass lesion that filled both frontal sinuses and right ethmoidal cells, caused erosion in the bone structures, and drooped into the right orbital extraconal area eroding the right lamina papricea (Figure 1).
Computed tomography (CT) of the facial sinuses revealed a large, solid, voluminous mass in the right nasal cavity, measuring 3.8 x 3.1 x 5.1 cm along its largest axes and extending into the left nasal cavity, ethmoidal cells, and cribriform plate, causing erosion of the plate.