Size of Bulla Ethmoidalis and Sinonasal Mucosa: Does it Matters in Osteomeatal Complex Obstruction?

Abstract

Bulla ethmoidalis is derived from the Latin word where bulla means a hollow, thin-walled, bony prominence. It is formed by pneumatisation of the bulla lamella or second ethmoid basal lamella [1]. It is one of the most constant features in the middle meatus containing the largest anterior ethmoidal cells, but it may be poorly aerated or completely unpneumatised, hence its alternative nomenclature of torus lateralis (lateral bulge) [2].