The sphenoid sinus mucoceles are rare and have an incidence of 1%, when sufficiently large they can compress optic canal, superior orbital fissure and vital structures causing optic neuropathy, ptosis, ophthalmoplegia and diplopia. We herein report a 73聽year old male who presented with headache and left lateral rectus palsy secondary to sphenoid sinus mucocele which was confirmed on MRI and successfully treated with endoscopic marsupialization.
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