Answer:
ONODI CELL LEFT
Findings:
Contiguous extension of the left posterior ethmoid sinus into sphenoid sinus seen. Opacification of the left Onodi cell –possible mucocele mildly indenting the left intracanalicular optic nerve. Pneumatization of both anterior clinoid processes with Type 2 optic nerves and Bony Dehiscence of the left optic nerve canal. Bilateral Anterior temporal lobe cysts .
Discussion:
An Onodi cell is a posterior ethmoid cell that extends lateral and superior to the sphenoid sinus and abuts the optic nerve. Kainz and Stammberger defined an Onodi cell as a posterior ethmoid cell with an endoscopically visible bulge of the optic canal. Prior knowledge of the existence of this is important to the endoscopic surgeon to prevent optic nerve damage. onodi cells can sometimes impinge the optic nerve as seen in our case. Onodi cell mucocele is an extremely unusual cause of compressive optic neuropathy.
Contributed By:
Dr. Babu Peter MD, DNB
Associate Professor, Barnard Institute of Radiology, Chennai
Senior Consultant Radiologist, Aarthi Scans, Chennai
ONODI CELL LEFT
Findings:
Contiguous extension of the left posterior ethmoid sinus into sphenoid sinus seen. Opacification of the left Onodi cell –possible mucocele mildly indenting the left intracanalicular optic nerve. Pneumatization of both anterior clinoid processes with Type 2 optic nerves and Bony Dehiscence of the left optic nerve canal. Bilateral Anterior temporal lobe cysts .
Discussion:
An Onodi cell is a posterior ethmoid cell that extends lateral and superior to the sphenoid sinus and abuts the optic nerve. Kainz and Stammberger defined an Onodi cell as a posterior ethmoid cell with an endoscopically visible bulge of the optic canal. Prior knowledge of the existence of this is important to the endoscopic surgeon to prevent optic nerve damage. onodi cells can sometimes impinge the optic nerve as seen in our case. Onodi cell mucocele is an extremely unusual cause of compressive optic neuropathy.
Contributed By:
Dr. Babu Peter MD, DNB
Associate Professor, Barnard Institute of Radiology, Chennai
Senior Consultant Radiologist, Aarthi Scans, Chennai