Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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Magnetic resonance imaging study of incidental findings in the paranasal sinuses and ostiomeatal complex

  • Yousefi, Faezeh (Department of Oral and Maxillofacial Radiology, School of Dentistry, Hamadan University of Medical Sciences) ;
  • Mollabashi, Mina (Department of Radiology, School of Medicine, Hamadan University of Medical Sciences) ;
  • Shokri, Abbas (Department of Oral and Maxillofacial Radiology, School of Dentistry, Hamadan University of Medical Sciences) ;
  • Tavakoli, Emad (Department of Oral and Maxillofacial Radiology, School of Dentistry, Hamadan University of Medical Sciences) ;
  • Farhadian, Maryam (Department of Biostatistics, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences) ;
  • Tavakoli, Ali (Department of Radiology, School of Medicine, Hamadan University of Medical Sciences)
  • Received : 2021.04.28
  • Accepted : 2021.08.28
  • Published : 2022.03.31
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Abstract

Purpose: This study aimed to assess incidental abnormal findings in the paranasal sinuses and anatomical variations of the ostiomeatal complex (OMC) on magnetic resonance imaging (MRI) scans. Materials and Methods: MRI scans of 616 patients (mean age, 44.0±19.4 years) were evaluated. Prior to obtaining the MRI scans, a checklist of patients' clinical symptoms was filled out after obtaining their consent. The Lund-Mackay classification was used to assess the paranasal sinuses and OMC. The prevalence of abnormal findings and their associations with patients' age, sex, and subjective symptoms were analyzed by the chi-square test, independent-sample t-test, and analysis of variance. The level of significance was set at 0.05. Results: Abnormal findings in the paranasal sinuses were detected in 32.0% of patients, with a significantly higher prevalence in males (P<0.05), but no significant association with age (P>0.05). Epithelial thickening and retention cyst were the most common abnormal findings in the paranasal sinuses. According to the Lund-Mackay classification, 93% of the study population had normal sinuses (score<4). Concha bullosa and paradoxical concha were detected in 15.3% and 3.4%, respectively, with no significant association with the presence of septal deviation or Lund-Mackay classification (P>0.05). Conclusion: Considering the relatively high prevalence of abnormal findings in the paranasal sinuses, it appears that clinical symptoms alone are not sufficient to diagnose sinusitis. A more accurate strategy would be to assess radiographic images of the paranasal sinuses and use a classification system. Sinusitis should be suspected in patients receiving a high score in this classification.

Keywords

Acknowledgement

This study was partially adapted from an MD thesis in maxillofacial radiology (thesis number: 9803072110), which was supported by the Vice-Chancellor of Research and Technology, Hamadan University of Medical Sciences, Hamadan, Iran.

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