Augmented reality-enhanced 3D navigation system for managing isolated Onodi sinusitis: advantages and insights.

INTRODUCTION AND

IMPORTANCE

The Onodi cell is a pneumatized posterior ethmoidal cell situated lateral and superior to the sphenoid sinus. It lies in close proximity to the posterior ethmoidal artery and the optic nerve. Isolated Onodi sinusitis is a rare condition but carries a high risk of optic nerve injuries.

PRESENTATION OF CASE: We report the case of an 86-year-old Caucasian woman with unilateral isolated Onodi sinusitis, incidentally diagnosed on a routine CT scan performed to investigate a general decline in health. Diagnostic methods, appropriate management, and follow-up are described.

CLINICAL DISCUSSION: The incidence of the sphenoethmoidal air cell, also known as the Onodi cell, has been reported to range from 51% to 60% in Asian cadaveric studies. Although isolated Onodi sinusitis is exceptionally rare, it has important clinical implications due to its close anatomical relationship with critical neurovascular structures. Early and accurate diagnosis, followed by appropriate management, is essential to ensure a favorable outcome.

CONCLUSION

Isolated Onodi cell sinusitis is exceptionally rare. The management of this condition should be tailored to each individual clinical situation, combining surgical and medical approaches.