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Case Reports
. 2020 Jun 2;13(6):e235311.
doi: 10.1136/bcr-2020-235311.

Optic neuropathy caused by expanded Onodi cell mucocele

Tsunetaro Morino #  1   2 , Taichi Yanagihara #  3 , Hiroki Kuroyanagi  3 , Hiroto Ohto  3
Affiliations
Case Reports

Optic neuropathy caused by expanded Onodi cell mucocele

Tsunetaro Morino et al. BMJ Case Rep. .
No abstract available

Keywords: ear, nose and throat; eye; otolaryngology / ENT.

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1
Axial (A), coronal (B) and sagittal (C) CT findings before the operation. An Onodi cell (white asterisk) was observed on top of the left sphenoid sinus, and a bone defect (yellow arrow) of the optic canal was observed in the Onodi cell. T1-weighted (D), T2-weighted (E) and enhanced T1-weighted (F) MRI findings before the operation. The lesion demonstrated high intensity on all images, and enhanced MRI revealed no contrast effect, including the surrounding tissue. T1-weighted MRI was treated with fat suppression. LSS, left sphenoid sinus; RSS, right sphenoid sinus; ST: superior turbinate.
Figure 2
Figure 2
Operative finding by endoscopic sinus surgery. (A) Left sphenoid sinus was widely opened from the natural ostium after removing the left superior nasal concha. (B) The Onodi cell on top of the sphenoid sinus was punctured to remove the cyst contents. (C) The Onodi cell was widely opened so as not to damage the optic nerve. (D) A bone defect of the optic canal was observed. NS, nasal septum; OC, Onodi cell; ON, optic nerve; SS, sphenoid sinus.
See this image and copyright information in PMC

References

    1. Onodi A. Das Verhaltnis des Nervus opticus zu Der KeilbeinhOhle und insbesondere zu Der hintersten Siebbeinzelle. Arch Laryng 1903;14:360–74.
    1. Wada K, Moriyama H, Edamatsu H, et al. . Identification of Onodi cell and new classification of sphenoid sinus for endoscopic sinus surgery. Int Forum Allergy Rhinol 2015;5:1068–76. 10.1002/alr.21567 - DOI - PubMed
    1. Tzamalis A, Diafas A, Riga P, et al. . Onodi cell mucocele-associated optic neuropathy: a rare case report and review of the literature. J Curr Ophthalmol 2019;14 10.1016/j.joco.2019.08.006 - DOI - PMC - PubMed

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