What is an onodi cell?
The Onodi cell is a posterior ethmoid air cell that lies superior to the sphenoid sinus and is in close proximity to at least one optic nerve or internal carotid artery (ICA). This close proximity of the Onodi cells to the optic nerve and ICA is a risk factor for surgical complications.
Are onodi cells normal?
Conclusion: Onodi cell is the most common anatomical variation of ethmoidal sinuses with higher prevalence among Asian populations. Their patterns of pneumatization are important clinically to avoid surgical damage to optic nerve and internal carotid artery canals.
What is sphenoid air cell?
Sphenoethmoidal air cell, also commonly known as the Onodi air cell, is an anatomical variant of the paranasal sinuses, important due to its close proximity to the optic nerve and internal carotid artery.
How do you identify onodi cells?
Both sagittal and coronal planes were used to identify the presence of Onodi cell. Onodi cell was identified as a posterior most ethmoid cell that in present either superior and/or lateral to sphenoid sinus. Further on sagittal plane, Onodi cell was seen separate from the posterior group of ethmoid air cells.
Where is the Sphenoethmoidal recess?
The sphenoethmoidal recess lies in the angle between the ethmoid bone and the anterior surface of the sphenoid bone, above and behind the superior turbinate. l-‘ The sphenoid sinus ostium is usually located in the posterior wall of this recess, but sometimes in its lateral wall.
Is there a relationship between onodi cell and optic canal?
Conclusion: Identification of Onodi cell is very important clinically because of its proximity to optic nerve canal. We concluded that type IV Onodi-optic canal relationship was the most common finding in our study.
What is the purpose of sphenoethmoidal recess?
The sphenoethmoidal recess drains the posterior ethmoid air cells and sphenoid sinuses into the superior meatus of the nasal cavity.
What is sphenoethmoidal recess?
Medical Definition of sphenoethmoid recess : a small space between the sphenoid bone and the superior nasal concha into which the sphenoid sinus opens.
What drains into sphenoethmoidal recess?
Sphenoidal Sinus The body of the sphenoid is hollowed out into 2 spaces, which are separated by a septum of bone. These are the sphenoidal sinuses. These drain into the sphenoethmoidal recess of their respective sides.
How do you treat Haller cells?
Surgical intervention is indicated when a Haller’s cell contributestoostiomeatalcomplexobstructionandinflam- mation of the sinuses. The cell is approac hed through the middle meatus by using a microdebrider to remove the uncinate process, including its inferior attachment (figure 2, A and B).
What is a Haller cell in the sinus?
Haller’s cells are defined as air cells situated beneath the ethmoid bulla along the roof of the maxillary sinus and the most inferior portion of the lamina papyracea, including air cells located within the ethmoid infundibulum.
Where is sphenoethmoidal recess located?
What opens into the sphenoethmoidal recess?
The sphenoethmoidal recess is a small space posterior and superior to the superior concha into which the sphenoidal sinus opens.