An ethmoid mucocele causing diplopia: A case report

Rationale:Mucocele is a disease lined primarily by epithelium, and occurs mainly when the sinus ostium is obstructed.Patient concerns:We report a case of a 37-year-old man who presented with painless proptosis of the right eye and diplopia.Diagnoses:The preoperative finding was mucocele of the ethmoid sinus.Interventions:We performed endoscopic sinus surgery, which included uncapping of the anterior and superior wall of the mucocele.Outcomes:The mucocele was treated safely and effectively without touching the medial orbital wall.Lessons:Clinicians should note that minimally invasive surgery to remove ethmoid mucoceles is relatively straightforward and can prevent the various complications associated with these lesions.