Mucocele of the sphenoid sinus with acute bilateral blindness: report of a case.

Paranasal sinus mucocele is not uncommon in Taiwan, but is relatively rare in the sphenoid sinus. The symptomatology of mucocele in the sphenoid sinus is quite vague, but it could be well explained by compressive neuropathy. Computed tomographic scanning is the diagnostic imaging study of choice if paranasal mucocele is suspected. This is a report of an unusual case of sphenoid sinus mucocele, presenting with sudden bilateral blindness. The bilaterla optic nerve neuropathy focused attention on the sphenoid sinus, and the patient's previous history of intranasal surgery further suggested the possibility of a mucocele. Computed tomography confirmed the suspicion. The patient recovered her visual function after sphenoidotomy.