Conclusions
In conclusion, this study reveals a significant association of accessory maxillary sinus ostia in superior meatus with less severe chronic rhinosinusitis. This suggests that patients with accessory maxillary sinus ostia in superior meatus may experience better chronic rhinosinusitis outcomes. Additionally, most cases with accessory maxillary sinus ostia in superior meatus are bilateral, and the condition is considered a congenital anatomical variation. However, further studies are required to analyse this structure in healthy subjects and in those with chronic maxillary sinusitis to illuminate the relationship between recurrent sinusitis and accessory maxillary sinus ostia in superior meatus.