A giant mucopyocele of the ethmoidal sinus resulting in impeding orbital complications

Mucoceles are benign and slow-growing lesions of the paranasal sinus that develop following blockage of the sinus ostium. It slowly enlarges and fills the paranasal sinus completely. If the mucocele content is infected, the lesion is called a mucopyocele. Most of the mucoceles are found in the frontal and anterior ethmoidal sinuses. It may expand to the orbit, leading to ocular disorders. The clinical manifestations of the paranasal sinus mucocele depend on the vital structures affected and can be classified as rhinological, ophthalmologic, and neurologic symptoms and signs. Preoperative computed tomography scan and magnetic resonance imaging are helpful to identify the size, location, and extension of the mucocele of mucopyocele of the paranasal sinus. The primary treatment of the mucocele or mucopyocele is a surgical approach like endoscopic sinus surgery with marsupialization of the mucocele. In this case report, we describe a case of a giant mucopyocele with an extension into the orbit.