Bilateral frontal sinus mucocele: Histopathological and clinical review of a case

Abstract

Paranasal sinus mucoceles are cystic lesions that occur as a result of accumulation of mucoid secretion and desquamated epithelium, leading to distension by growing in an expansile and destructive manner within the sinus wall. The frontal sinus is most commonly involved, whereas sphenoid, ethmoid, and maxillary mucoceles are rare. However, bilateral frontal sinus involvement is more rare. If the cyst invades the adjacent orbit and continues to expand within the orbital cavity, the mass may mimic the behaviour of many benign growths primary in the orbit. Here, we present a case with frontal mucocele involving bilateral sinuses. It was manifested with proptosis and exophthalmia of the left eye in a forty years-old male patient. Paranasal computed tomography scan and magnetic resonance imaging revealed an image consistent with mucocele. We performed intranasal frontal sinusectomy via endoscopic approach. No orbital and intranasal complication developed at the end of the surgery. We report here that endoscopic drainage, performed by experienced hands, could be preferred surgical approach in rare case of bilateral frontal mucocele case.