Published on Feb 12, 2021
ENT
42. Sinus associated Cells
- Agger nasi cells: Most anterior of Anterior ethmoidal cells and lie close to frontal recess; can obstruct frontal sinus drainage.
- HAller cell: Anterior Ethmoidal cell in roof of maxillary sinus/floor of orbit. Haller cells overlooked during surgery can be a source of persistent mucopurulent secretion.
- Onodi cell:POsterior ethmoidal cell related to optic nerve; identify these cells during FESS to avoid optic N injury