Idiopathic mucocele of maxillary sinus: A rare and frequently misdiagnosed entity

Maxillary sinus mucocele is an unusual uncommon benign lesion which develops due to retained secretions and presents as an expansile cystic lesion. Presenting symptoms are nonspecific and mostly due to pressure effects on the orbit or facial deformity. Etiology of such mucoceles is not well understood, and it is postulated that they ensue due to obstruction of the ostium by inflammation or previous procedures such as Caldwell-Luc surgery. De novo origins are rare causing unnecessary investigations and delayed diagnosis and treatment. Endoscopic marsupialization of the mucocele is the surgery of choice, even though complicated cases maybe approached by an external route. We present a case of right maxillary mucocele without an identifiable cause, which is reported due to its rarity and delayed management.