What are risks in a surgery for sphenoid polyp?

Significant. If the polyp in the sphenoid sinus is asymptomatic, follow it semi-annually. The risks of sphenoid sinus surgery are related to the anatomical landmarks. Superiorly, the pituitary gland, and laterally, the optic nerve and the carotid artery. A well trained ENT doctor knows the anatomy of the sphenoid sinus and will take great care to avoid these areas.