[Giant mucocele of all paranasal sinuses with massive bilateral globe displacement]

Although of benign nature and slowly progressive, paranasal sinus mucoceles may, depending on their localization, cause a multitude of ophthalmological symptoms due to compression and displacement of adjacent tissue. Here we report the unusual case of a patient suffering from a progressively growing giant mucocele that developed years after ENT surgery and that was neglected for almost 2 decades despite massive symptoms. This case report demonstrates the importance of including mucoceles of the paranasal sinuses into the differential diagnosis of unilateral or bilateral proptosis.