title: Anatomic Variations in Paranasal Sinuses of Patients With Sinonasal Polyposis: Radiological Evaluation.
abstract: OBJECTIVE
  Although sinonasal anatomic variations have been postulated as a risk factor for sinus disease, the role of anatomic abnormalities in the pathogenesis of nasal polyps is still unclear. This study was conducted to examine the association of sinonasal polyposis with anatomic variations.
  
  
  METHODS
  The paranasal sinus computerized tomography scans of 155 patients with sinonasal polyposis were examined retrospectively from January 2012 to 2014 in a tertiary care hospital. Paranasal sinus computerized tomography of 100 patients without complaints and signs of sinus disease were also included to serve as control group. The incidence of anatomic variations was evaluated. The sinonasal polyposis and control group data was compared statistically.
  
  
  RESULTS
  The incidence of the septal deviation, concha bullosa, Agger nasi, frontal sinus hypoplasiaand accessory sinus ostium in healthy subjects, and sinonasal polyposis patients revealed statistically significant difference. The mentioned variations were found significantly higher in sinonasal polyposis patients (P = 0.000, P = 0.000, P = 0.001, P = 0.002, and P = 0.035 respectively) and may be predisposing for this pathology.
  
  
  CONCLUSIONS
  Considering the results obtained, the presence of septal deviation, concha bullosa, Agger nasi cell, frontal sinus hypoplasiaand accessory sinus ostium may play role in pathogenesis of sinonasal polyposis.
authors.affiliation: *ENT Clinic†Radiology Clinic, Şişli Hamidiye Etfal Training and Research Hospital, Şişli, Istanbul, Turkey.
authors.forename: Türk
authors.initials: T
authors.lastname: Bilge
authors.forename: Meltem
authors.initials: M
authors.lastname: Akpinar
authors.forename: Abdullah Soydan
authors.initials: AS
authors.lastname: Mahmutoğlu
authors.forename: Irmak
authors.initials: I
authors.lastname: Uçak
authors.forename: Berna
authors.initials: B
authors.lastname: Uslu Coşkun
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D063405:Anatomic Variation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009296:Nasal Cavity / Q000000981:diagnostic imaging; D009303:Nasopharyngeal Neoplasms / Q000150:complications; D010254:Paranasal Sinus Diseases / Q000175:diagnosis*; D010256:Paranasal Sinuses / Q000000981:diagnostic imaging*; D011127:Polyps / Q000175:diagnosis*; D012189:Retrospective Studies; D012307:Risk Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult