Anterior ethmoidal notch
Disclosures
- updated 6 Dec 2022:
Nothing to disclose
Updates to Article Attributes
Body
was changed:
The anterior ethmoidal notch contains the anterior ethmoidal artery and has significant rates of anatomic variation that put the artery during functional endoscopic sinus surgery (FESS).
Gross anatomy
The anterior ethmoidal notch lies in the medial wall of the superomedial orbit, adjacent to the anterior ethmoid air cells.
Radiographic features
CT
- the notch can be identified bilaterally in 95-100% of patients on coronal reformats, and when not seen bilaterally is present unilaterally 1
Related pathology
During FESS the anterior ethmoidal artery is considered "protected" if the notch is adjacent to the fovea ethmoidalis or lateral lamella. The anterior ethmoidal artery is at increased risk of injury during FESS if there are pneumatised supraorbital anterior ethmoid air cells (occurs in ~30% of patients) 1.
-<p>The <strong>anterior ethmoidal notch</strong> contains the <a href="/articles/anterior-ethmoidal-artery">anterior ethmoidal artery</a> and has significant rates of anatomic variation that put the artery during <a href="/articles/functional-endoscopic-sinus-surgery-1">functional endoscopic sinus surgery (FESS)</a>.</p><h4>Gross anatomy</h4><p>The anterior ethmoidal notch lies in the medial wall of the superomedial <a href="/articles/orbit">orbit</a>, adjacent to the anterior <a href="/articles/ethmoidal-air-cells">ethmoid air cells</a>. </p><h4>Radiographic features</h4><h5>CT</h5><ul><li>the notch can be identified bilaterally in 95-100% of patients on coronal reformats, and when not seen bilaterally is present unilaterally <sup>1</sup>- +<p>The <strong>anterior ethmoidal notch</strong> contains the <a href="/articles/anterior-ethmoidal-artery">anterior ethmoidal artery</a> and has significant rates of anatomic variation that put the artery during <a href="/articles/functional-endoscopic-sinus-surgery-1">functional endoscopic sinus surgery (FESS)</a>.</p><h4>Gross anatomy</h4><p>The anterior ethmoidal notch lies in the medial wall of the superomedial <a href="/articles/orbit">orbit</a>, adjacent to the anterior <a href="/articles/ethmoidal-air-cells">ethmoid air cells</a>. </p><h4>Radiographic features</h4><h5>CT</h5><ul><li>the notch can be identified bilaterally in 95-100% of patients on coronal reformats, and when not seen bilaterally is present unilaterally <sup>1</sup>
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