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  • Title: Clinics in diagnostic imaging (120). Right rhinogenic optic neuritis secondary to mucocoele of the Onodi cell.
    Author: Lim SA, Sitoh YY, Lim TC, Lee JC.
    Journal: Singapore Med J; 2008 Jan; 49(1):84-7; quiz 88. PubMed ID: 18204776.
    Abstract:
    Acute visual loss can be caused by retrobulbar optic neuritis, radiation optic neuropathy or ischaemic optic neuropathy. Sinusitis affecting the Onodi cell, a posterior ethmoidal air cell that has encroached on the adjacent sphenoid bone forming the optic canal, can present rarely with visual loss. We report a 60-year-old man, who developed a sudden ache on the nasal aspect of his right eye, and deterioration of the vision in his right eye. This case illustrates the typical radiological appearances of the Onodi cell on MR imaging and CT. The diagnosis of right rhinogenic optic neuritis secondary to mucocoele of the Onodi cell was confirmed at surgery. Functional endoscopic sinus surgery with decompression of the Onodi cell was performed. Physicians should be familiar with the presentation, performed. Physicians should be familiar with the presentation, diagnosis and management of this rare but important condition.
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