Frontal Sinus Mucocele Leading to Non-Axial Proptosis

Abstract

Mucocele of a paranasal sinus is an accumulation of mucoid secretion and desquamated epithelium within the sinus with distension of its walls and is regarded as a cyst such as expansile and destructive lesion. The frontal sinus is most commonly involved, whereas sphenoid, ethmoid, and maxillary mucoceles are rare. Floor of frontal sinus is shared with the superior orbital wall which explains the early displacement of orbit in enlargin g frontal mucoceles. Frontal sinus mucoceles are prone to recurrences if not managed adequately.