Anterior Maxillary Wall and Lacrimal Duct Distance in a Single-Center Sample of Filipinos: CT Analysis for Prelacrimal Window Access to the Maxillary Sinus
DOI:
https://doi.org/10.32412/pjohns.v40i2.2609Keywords:
prelacrimal window, paranasal sinus, endoscopic sinus surgery, maxillary sinus, paranasal sinus neoplasmsAbstract
Objective: To determine if the prelacrimal window approach is feasible in a Filipino population by measuring the distance between the anterior maxillary wall and lacrimal duct in paranasal sinus CT scans, classifying them into prelacrimal window approach levels of difficulty.
Methods:
Design: Retrospective Review of Records
Setting: Tertiary Private University Hospital
Participants: PNS CT scans of Filipino patients 18 years old or above
Results: A total of 169 PNS CT scans were reviewed, measuring the right and left sides for a total of 338 sides. The mean prelacrimal window distance for males was 5.70mm (±1.79), while for females it was 4.94 (±1.75), with a combined mean distance of 5.32mm. Ten percent (10%) of CT scans (34) were classified as Type 1; 73.7% (249) were classified as Type 2, and 16.3% (55) were classified as Type 3.
Conclusion: The prelacrimal window approach may be anatomically feasible in the Filipino population studied, with 90% of the PNS CT scan sides reviewed falling into the Type 2; and Type 3 categories, opening more potential avenues in the management of anterior maxillary lesions in the Philippines.
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