SPHENOID SINUS MUCOCELE PRESENTING WITH ISOLATED OCULOMOTOR NERVE PALSY

We describe two cases of sphenoid sinus mucocoele. Both presented with isolated oculomotor nerve palsy. Mucocoeles involving only the spheno id sinus are uncommon. They are probably under-diagnosed as they may b e asymptomatic or cause non-specific symptoms. Nasal symptoms occur in frequently but the close relationship of the sphenoid sinus to the orb ital apex means that ocular symptoms including cranial nerve pa!sies a re a common presenting feature. Involvement of the third cranial nerve in isolation is rare but has important neurosurgical implications whi ch must be excluded before this symptom is attributed to the sphenoid sinus.