JOURNAL ARTICLE
OBSERVATIONAL STUDY
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Anatomic variations of the paranasal sinuses in the general pediatric population.

Rhinology 2019 June 2
BACKGROUND: The prevalence of sinuses' anatomic variations in the healthy pediatric population has not been studied. The study describes the prevalence of known anatomic variations with regard to gender and age in this population.

METHODS: A single academic institute observational cohort study. A total of 200 head CT scans were reviewed, subdivided into five equal age subgroups (0-4.99; 5-7.99; 8-10.99; 11-13.99; 14-17 years), with an equal male to female ratio. Different subgroups were randomly assigned to two senior residents (100 CTs each). A senior rhinologist and radiologist were randomly selected to review 100 CTs each. Consensus was reached after a joint review. Each CT was evaluated for the presence of sinuses and the following variations: deviated septum, frontoethmoidal, infraorbital, posterior-ethmoid cells (Kuhn, Haller, and Onodi cells, respectively) and concha bullosa. Definitions were made according to the European Position on Rhinosinusitis 2012.

RESULTS: Gender did not affect sinus development or anatomical variations. The frontal and sphenoid sinuses were significantly less developed in the 0-4.99 years group. The point prevalence of concha bullosa and deviated septum significantly increased with age. The point prevalence of Haller cells demonstrated borderline significance among age groups, with children 0-4.99 demonstrating the lowest point prevalence. A significant association was found between the existence of Haller cells to Kuhn and Onodi cells.

CONCLUSIONS: Anatomical variations should be expected in the pediatric population. Familiarity with their point prevalence and associations may assist pediatric endoscopic sinus surgery planning.

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