Haller cell

Hal·ler cell

a variant of ethmoidal air cell developing into the floor of the orbit adjacent to the natural ostium of the maxillary sinus. A diseased Haller cell is capable of obstructing that ostium and producing a maxillary sinusitis.
References in periodicals archive ?
The Haller cell was resected and was found to contain a mucocele full of thick, yellow mucus (figure, D).
A diagnosis of a Haller cell cannot be made during transnasal endoscopy, because this cell is lateral to the lateral nasal wall.
A diagnosis of Haller cell is easily made on coronal sinus CT, which is the primary means of diagnosing anatomic variations.
Haller cell mucocele or empyema with purulent secretions can cause a constant or episodic impingement of the ethmoid infundibulum.
The anatomic relevance of the Haller cell in sinusitis.
Haller cells are located below the bulla ethmoidalis and extend beneath the floor of the orbit (Figs 4 and 5).
Computed tomography (CT) of the sinuses demonstrated prominent Haller cells impinging on the ethmoid infundibulum and the maxillary sinus outflow tracts (figure, A).
Telescopy with a 4-mm, 30[degrees] scope defined the Haller cells well.
Haller cells (infraorbital cells) are believed to develop in the anterior ethmoid system.