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Is there a relationship between Onodi cell and optic canal?
Adnan Özdemir1, Nuray Bayar Muluk2,3, Neşe Asal1
1Radiology Department, Faculty of Medicine, Kırıkkale University, Kırıkkale, Turkey.
Summary
Onodi cells, an anatomical variation near the optic nerve canal, were found in 21.2% of patients. The study highlights the importance of identifying Onodi cells on paranasal sinus computed tomography (PNSCT) to prevent optic canal damage.
Area of Science:
- Anatomy
- Radiology
- Ophthalmology
Background:
- Onodi cells are an anatomical variation of the sphenoid sinus.
- Their proximity to the optic nerve canal poses potential clinical significance.
Purpose of the Study:
- To investigate the relationship between Onodi cells and the optic canal using paranasal sinus computed tomography (PNSCT).
- To evaluate the prevalence and anatomical characteristics of Onodi cells and their association with optic canal and anterior clinoid process pneumatization.
Main Methods:
- Retrospective analysis of 508 paranasal sinus computed tomography (PNSCT) scans.
- Evaluation of Onodi cell presence, pneumatization types, optic canal types, sphenoid sinusitis, and anterior clinoid process (ACP) pneumatization.
Main Results:
- Onodi cells were present in 21.2% of patients, with higher prevalence on the right side and bilaterally.
- Type IV optic canal was the most common finding, with a positive correlation between Onodi cell and optic canal types.
- A statistically significant relationship was found between Onodi cell presence and ACP pneumatization.
Conclusions:
- Onodi cell identification is crucial due to its proximity to the optic nerve canal.
- The Type IV Onodi-optic canal relationship is the most frequent finding.
- Preoperative evaluation of Onodi cells and their pneumatization patterns on PNSCT is essential to prevent optic canal damage.
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