From the case:
Keros classification (illustration)
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The Keros classification divides the depth of the olfactory groove into three types based on the vertical height of the lateral lamella, one of the thinnest parts of the anterior cranial fossa.
Case Discussion
The Keros classification is widely used when discussing the anatomy of the olfactory groove particularly in the setting of functional endoscopic sinus surgery (FESS).
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