Mucocele of the Sphenoid, Ethmoid and Frontal Sinuses Presenting with Proptosis, Visual Impairment and Diplopia

Mucocele of the paranasal sinus is accumulation of the mucoid secretion within the sinus caused by obstruction of the sinus ostium. We report a case of paranasal sinus mucocele presented with proptosis in right eye, diplopia, visual impairment and headache. Magnetic resonance imaging(MRI) revealed a polyp in right anterior ethmoid sinus and nasal cavity resulted in mucocele of the sphenoid, ethmoid and right frontal sinuses.