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Related to Agger nasi: fovea ethmoidalis, limen nasi
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Vertical insertion of the middle turbinate: A sign of the presence of a well-developed agger nasi cell.
Obstructive agger nasi cells can be removed with either conventional or powered instruments.
In this article, we describe our discovery of a naturally draining ostium of an agger nasi cell.
Depending on the degree of pneumatization, agger nasi cells can be bounded anteriorly by the frontal process of the maxilla, anterolaterally by the nasal and lacrimal bones, posterolaterally by the lamina papyracea, superiorly by the frontal sinus, inferolaterally by the uncinate process, and posteriorly by the anterior ethmoid complex.
Table 2 Our risk-assessment scoring system Structure Left Right Absent frontal sinus 0 or 1 0 or 1 Absent sphenoid sinus 0 or 1 0 or 1 Agger nasi cells 0 or 1 0 or 1 Asymmetric sphenoid septum 0 or 1 0 or 1 Cribriform plate 0 or 1 0 or 1 Haller's cells 0 or 1 0 or 1 Internal carotid cover 0 or 1 0 or 1 Lamina papyracea 0 or 1 0 or 1 Optic nerve cover 0 or 1 0 or 1 Pneumatized ethmoid roof 0 or 1 0 or 1 Uncinate process 0 or 1 0 or 1 Key: 0: normal; 1: definite anomaly.
Polyps blocking the frontal recess opening into the middle meatus were cleared, agger nasi cells were exenterated, and mucus was drained from the frontal sinus.