ethmoidal cell


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ethmoidal cell

n.
Any of the cavities in the ethmoid bone that are filled with air and that communicate with the nasal cavity.
References in periodicals archive ?
KEY: Anterior (A); Posterior (P); Medial (M); Lateral (L); Optic Nerve (ON); Intersinus Septa (ISa); Intrasinus Septum (IntrS); Crista Galli (CG); Left Sphenoidal Sinus (LSS); Right Sphenoidal Sinus (RSS); Posterior Ethmoidal Cells (PEC)
The AN cells were defined as the anterior ethmoidal cells pneumatized from the frontal recess, as previously defined by Messerklinger (4).
In the simplest case, the patient can have only one AN cell without the frontal ethmoidal cells.
Supraorbital ethmoidal cells: The ethmoid air cells can extend supraorbitally and is said to be present in 15% to 21% according to Bhatt NJ.
This mass is infiltrating the left nasal cavity, ethmoidal cells, and cribriform plate, causing erosion to the plate.
There is a direct communication between the ethmoidal cells and the orbit by the anterior and posterior ethmoidal vessels.
During the age of 2 to 6 years anterior ethmoidal cells migrate to frontal bone and become frontal (fronto-ethmoidal) cells.
Trauma to the middle turbinate was seen in 5 cases while in 4 cases there was accidental entry into anterior ethmoidal cells. In 8 cases there was difficulty in making a bone window.
Trauma to the middle turbinate, accidental entry into anterior ethmoidal cells and difficulty in making a bone window are the complications encountered and managed intra operatively by a single surgeon.
Occasionally the anterior ethmoidal cells were opened accidentally and further damage was avoided by restricting surgery limited to the lacrimal sac region.
Agger nasi cells.-Agger nasi cells, the most constant ethmoidal air cells, lie below the frontal sinus, inferolateral to the lacrimal sinus, and represent pneumatization of the lacrimal bone by extension of the anterior ethmoidal cells (12).