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The Onodi Cell: An Anatomic Illustration.

Ali Tayebi Meybodi1, Vera Vigo1, Arnau Benet1

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|May 16, 2017
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Summary

Identifying the sphenoethmoidal (Onodi) cell, a paranasal sinus variant, is crucial. Accurate identification prevents neurovascular injury during skull base endoscopic surgery.

Keywords:
Endonasal approachEndoscopyEthmoid sinusInternal carotid arteryOptic nerveParanasal sinusSphenoethmoidal cellSphenoid sinus

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Area of Science:

  • Anatomy
  • Neurosurgery
  • Radiology

Background:

  • The sphenoethmoidal (Onodi) cell is a rare anatomical variation of the paranasal sinuses.
  • Variations in paranasal sinus anatomy can pose risks during surgical procedures.

Purpose of the Study:

  • To highlight the anatomical features of the sphenoethmoidal (Onodi) cell.
  • To emphasize the clinical significance of identifying this cell in skull base surgery.

Main Methods:

  • Anatomical imaging review.
  • Surgical case review.

Main Results:

  • The sphenoethmoidal (Onodi) cell is an extension of the sphenoid sinus.
  • Its proximity to the optic nerve and internal carotid artery is a key surgical consideration.

Conclusions:

  • Accurate preoperative identification of the sphenoethmoidal (Onodi) cell is essential.
  • Awareness of this anatomical variant aids in preventing potential neurovascular complications during endoscopic skull base surgery.