Agger nasi

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Agger nasi
Gray856.png
Lateral wall of nasal cavity; the three nasal conchæ have been removed.
Latin Agger nasi
Gray's p.161
Anatomical terms of bone

The agger nasi (from agger meaning "mound or heap") is a small ridge on the lateral side of the nasal cavity. It is located midway at the anterior edge of the middle nasal concha, directly above the atrium of the middle meatus. It is formed by a mucous membrane that is covering the ethmoidal crest of the maxilla.

It is also called the nasoturbinal concha and the nasal ridge. An enlarged agger nasi cell may encroach the frontal recess area, constricting it and causing mechanical obstruction to frontal sinus drainage.

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