Concha bullosa.

Concha bullosa is one of the most common, obstructive, anatomic variants seen in patients with sinusitis. In this study, a total of 160 patients with sinusitis were evaluated to study both the effects of concha bullosa on the distribution of opacification to the paranasal sinuses as well as the relations between the types of concha bullosa (CB) and ostiomeatal complex disease (OMCD). Our results show that CB does not necessarily have influence on the distribution of mucosal changes to paranasal sinuses. Furthermore, in the presence of OMCD, no significant difference statistically was found between patients with CB and those without. However, when the types of CB are considered, OMCD is found to be more frequent if the pneumatization is localized to the inferior half of the middle turbinate, such as in bulbous and extensive types of CB.