Optic canal decompression in patients with vision reduction due to tumour growth in optic canal: A technical note

Improvement of the vision is one of the main goals in skull base meningiomas compressing the optic nerve (ON) in optic canal (OC). Extracranial drilling of anterior clinoid process with extradural optic canal decompression has been demonstrated in anterior clinoid meningioma surgery. Extensive drilling of anterior clinoid has however some morbidity. Here we demonstrate the technical aspects of intradural opening of optic canal using Kerrison rongeur. This technique is effective and has no additional morbidity.