Morphometric Measurements of Bony Nasolacrimal Canal in Children

Objective: Morphology and dimensions of the bony nasolacrimal canal duct (BNLD) as a key factor in the development of primary acquired nasolacrimal duct obstruction. We aimed to obtain detailed morphometric analysis of BNLD in children without nasolacrimal duct pathology by using computed tomography and provide standard measurements by means of age which could be utilized in planning management or in invasive interventions. Methods: Picture Archiving Communication Systems database of our hospital's radiology department was searched for this retrospective study. Subjects were under 18 years of age who had undergone a paranasal, maxillofacial, or temporal bone high-resolution computed tomography scan in last 2 years with various indications. Those with fractures including facial bones and/or nasolacrimal canal or history of nasolacrimal duct pathology were excluded from the study. We measured the diameter, angle, and surface area of BNLD. Results: A total number of 136 subjects (86 boys, 50 girls) were included in the study. The average age was 7.3 ± 5.1 years. We documented statistically significantly positive correlation between all measured diameters and ages (P  0.050). Conclusion: Our study demonstrated that development of BNLD continues during childhood, regardless of gender. Address correspondence and reprint requests to Araz Server Ela, MD, Istanbul EğitimveAraştirma Hastanesi, Kulak BurunBoğazKliniği, KasapIlyasMah, Org. Abdurrahman NafizGürman Cad, Fatih, Istanbul 34098, Turkey; E-mail: serverela@hotmail.com Received 19 September, 2017 Accepted 12 November, 2017 This manuscript was presented in 8th National Congress of Istanbul Society of Otorhinolaryngology and Head & Neck Surgery, September 22–25, 2016, in Sakarya, Turkey. The authors have no conflicts of interest to report. © 2018 by Mutaz B. Habal, MD.

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