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. 2022 Nov-Dec;88 Suppl 5(Suppl 5):S108-S111.
doi: 10.1016/j.bjorl.2022.02.002. Epub 2022 Feb 28.

Relationship of the anterior ethmoid sinus to the lacrimal sac: a computed tomography study

Beatriz de Costa Remor  1 , Leonardo Balsalobre  2 , Simone Haber Duellberg Von Faber Bison  3 , Maria Helena Salgado Delamain Pupo Nogueira  2 , Ana Taíse de Oliveira Meurer  2 , David Caetano Bastos  4 , Aldo Cassol Stamm  2
Affiliations

Relationship of the anterior ethmoid sinus to the lacrimal sac: a computed tomography study

Beatriz de Costa Remor et al. Braz J Otorhinolaryngol. 2022 Nov-Dec.

Abstract

Objective: To analyze the anatomical relationship between the lacrimal sac and the agger nasi cell on Computed Tomography (CT); to correlate the right and left sides on each scan.

Methods: CT scans of adult patients were reviewed for pneumatization of the agger nasi and its relationship to the lacrimal sac. The degree of agreement between the right and left sides was also evaluated.

Results: A total of 130 CT scans were examined. An agger nasi cell was found medial to the lacrimal sac in 59.23% of scans. On 86.15% of scans, pneumatization was similar on both sides.

Conclusion: The agger nasi air cell is located medial to the lacrimal sac in more than half of individuals. The right and left sides exhibit the same pneumatization pattern in approximately 80% of cases.

Keywords: Agger nasi; Anterior ethmoid sinus; Computed tomography; Dacryocystorhinostomy; Ethmoidal sinus.

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Figures

Figure 1
Figure 1
Agger nasi cell located medial to the lacrimal sac. (A) CT scan (coronal slice) showing agger nasi cell (red) medial to the lacrimal sac (blue) at the level of the common canaliculus on the right. (B) CT scan (axial slice) showing agger nasi cell medial to the lacrimal sac on the right.
Figure 2
Figure 2
CT scan (axial slice) showing agger nasi cell (red) located posterior to the lacrimal sac (blue) bilateral.
See this image and copyright information in PMC

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