Accessory maxillary sinus ostia in superior meatus: a retrospective
study and its clinical application
Abstract
Objectives: To investigate the incidence of accessory maxillary sinus
ostia in superior meatus in patients with clinical and radiological
signs of maxillary sinusitis and the association with the development of
chronic rhinosinusitis. Design: Retrospective study Setting: Tertiary
care hospital Participant: 159 patients examined with paranasal sinus
computed tomography scans Main outcome measures: We retrospectively
evaluated patients who visited the outpatient department at an academic
medical facility between January and April 2020 with a clinical
diagnosis of chronic rhinosinusitis. Paranasal sinus axial and coronal
computed tomography scans were evaluated for accessory maxillary sinus
ostia in superior meatus and confirmed by reconstructed
three-dimensional simulation images. The demographic information and
incidence of accessory ostia in superior meatus were assessed. The
Lund–Mackay score was used to rate chronic rhinosinusitis severity.
Analysis of variance was performed to correlate the severity of chronic
rhinosinusitis with presenting accessory ostia in superior meatus.
Results: Of 159 patients (81 males; 78 females), 41.5% had accessory
maxillary sinus ostia in superior meatus. Of these, two-thirds were
bilateral and one-third was unilateral. The severity of rhinosinusitis
was not correlated with having accessory maxillary sinus ostia in
superior meatus, but the presence of accessory ostia was significantly
associated with less severe chronic rhinosinusitis (P <
0.001). Conclusions: Accessory maxillary sinus ostia in superior meatus
are significantly associated with less severe chronic rhinosinusitis and
most cases are bilateral.