Abstract
Onodi cells are anatomical variants of the posterior ethmoidal cells, which are greatly pneumatized laterally, and to some degree superiorly, to the sphenoid sinuses. Th e clinical importance of the Onodi cell is that it contains the optic canal and lies in close proximity to the optic nerve. Al-though the incidence of Onodi cell pa-thologies such as mucocele is extremely low, they may cause ophthalmological complications due to the close anatomical proximity between the Onodi cell and the optic nerve. Optic neuritis caused by as-pergillosis of the Onodi cell, presenting in the Emergency Department as an aspergil-loma within a pyomucocele, has not been reported previously. Here, we describe the fi rst such case; the aspergilloma within the pyomucocele was completely removed via surgical endoscopy.
Highlights
Onodi cells are anatomical variants of the posterior ethmoidal cells, which are greatly pneumatized laterally, and to some degree superiorly, to the sphenoid sinuses. (1) The clinical importance of the Onodi cell is that it contains the optic canal and lies in close proximity to the optic nerve, as a result of which Onodi cell pathologies may lead to ophthalmological complications. (2) cases of isolated mucoceles in Onodi cells have been reported, there is only blood pressure of 113/81 mm Hg, pulse of 56 beats/minute, respiration rate of 18 breaths/minute, and body temperature of 37.5°C
(6) Patients with Onodi cell infections may present with optic neuritis, and 3 potential etiological mechanisms have been proposed
The second hypothesis is that infection in an Onodi cell causes local inflammation and secondary optic neuritis via a cleavage in the optic canal wall or via a bone resorption site
Summary
Onodi cells are anatomical variants of the posterior ethmoidal cells, which are greatly pneumatized laterally, and to some degree superiorly, to the sphenoid sinuses. (1) The clinical importance of the Onodi cell is that it contains the optic canal and lies in close proximity to the optic nerve, as a result of which Onodi cell pathologies may lead to ophthalmological complications. (2) cases of isolated mucoceles in Onodi cells have been reported, there is only blood pressure of 113/81 mm Hg, pulse of 56 beats/minute, respiration rate of 18 breaths/minute, and body temperature of 37.5°C. The clinical importance of the Onodi cell is that it contains the optic canal and lies in close proximity to the optic nerve. The incidence of Onodi cell pathologies such as mucocele is extremely low, they may cause ophthalmological complications due to the close anatomical proximity between the Onodi cell and the optic nerve. Optic neuritis caused by aspergillosis of the Onodi cell, presenting in the Emergency Department as an aspergilloma within a pyomucocele, has not been reported previously.
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