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ORIGINAL ARTICLE
Year : 2019  |  Volume : 22  |  Issue : 5  |  Page : 603-608

Anatomic variations associated with antrochoanal polyps


1 Department of Radiology, Faculty of Medicine, Izmir Democracy University, Izmir, Turkey
2 Department of Radiology, Izmir Katip Celebi University Ataturk Training and Research Hospital, Izmir, Turkey
3 Department of Otorhinolaryngology, Izmir Katip Celebi University Ataturk Training and Research Hospital, Izmir, Turkey

Correspondence Address:
Dr. M Gursoy
Izmir Democracy University, Faculty of Medicine, Gursel Aksel Bulv. No: 14, Karabaglar, Izmir
Turkey
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/njcp.njcp_419_18

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Objective: Although more than a century has passed since antrochoanal polyps (ACPs) were first defined, etiopathogenesis still remains unclear. The aim of this study was to investigate the relationship between ACPs and sinonasal cavity variations. Subjects and Methods: One hundred and forty-four patients with ACP on paranasal sinus computed tomography scans (ACP group) and 160 paranasal sinuses without ACP (control group) were included into the study. The study group was evaluated in respect of the presence of retention cyst in the contralateral maxillary sinus and sinus bone wall sclerosis thickening. Both groups were also compared with respect to the frequency of sinonasal anatomic variations, nasal septal deviation, variations of the uncinate process insertion, concha bullosa, paradoxical middle turbinate, and accessory maxillary sinus ostium. In the ACP group, the cases with septal deviation (SD) were also evaluated whether the deviation convexity was towards the polyp side or the opposite side. In addition, the posterior extension of ACPs were evaluated in three groups as middle meatus, nasopharynx, and oropharynx extension. Results: The prevalence of retention cyst, sinus wall sclerosis thickening, SD, and accessory maxillary ostium was significantly higher in the ACP group. A negative directional correlation was determined between the SD side and ACP side. When the ACP extensions were examined, middle meatus extension was seen in 32.6%, nasopharynx in 56.3%, and oropharynx in 11.1%. Conclusion: Accessory ostium may be an accelerating factor in the transformation of retention cyst to ACP. Furthermore, the changes in the nasal passage airflow on the opposite side suggest that SD contributes to this process.


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