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Optic neuropathy produced by a compressed mucocele in an Onodi cell
Kiyotaka Kitagawa1, Seiji Hayasaka, Katsutoshi Shimizu
1Department of Ophthalmology, Toyama Medical and Pharmaceutical University, Sugitani, Toyama, Japan. ophthal@ms.toyama-mpu.ac.jp
Purpose:
To describe a patient with compressive optic neuropathy caused by a mucocele in an Onodi cell.
Design:
Interventional case report.
Methods:
A 73-year-old man complained of sudden visual loss in the left eye 10 days after cataract surgery. Coronal computed tomography showed a homogeneous mass in an Onodi cell. Magnetic resonance imaging revealed an oval-shaped lesion that compressed the left optic nerve.
Results:
After endoscopic microsurgery of the paranasal sinus, visual acuity in the left eye improved. Histopathological examination of the excised specimen showed a mucocele.
Conclusions:
Ophthalmologists should be aware that the mucocele in the Onodi cell, an anatomical variation of the paranasal sinus, may compress the optic nerve.