Incidence of mucocele is lowest in

Paranasal sinus mucocelesmost commonly occur in the third or fourth decades of life with a slight male predilection. The frontal sinus is most commonly affected followed by the ethmoid sinuses, with reports suggesting 70–90 % of mucoceles occur in these locations. Ten percent of mucoceles occur in the maxillary sinus and the sphenoid sinus is involved rarely