Fig. 14From: Flying through congested airspaces: imaging of chronic rhinosinusitisNasal polyposis: diffuse bilateral thickening of the mucosa investing the middle meati, the middle turbinate, and the anterior and posterior ethmoid cells. The turbinates and ethmoid labyrinth are distorted and partially decalcified. Retained secretion can be seen within the blocked maxillary and sphenoid sinusesBack to article page