Functional endoscopic sinus surgery
Functional endoscopic sinus surgery (FESS) is a surgical treatment of sinusitis and nasal polyps, including bacterial, fungal, recurrent acute, and chronic sinus problems. FESS uses nasal endoscopes to restore drainage of the paranasal sinuses and ventilation of the nasal cavity. This procedure is generally used for inflammatory and infectious sinus disease. For example, chronic sinusitis that doesn't respond to drugs, nasal polyps, some cancers, decompressing the eye sockets in Graves ophthalmopathy, decompressing the optic nerve, and removing foreign bodies.
Risks of the procedure include damage to the eye or the bones around it, damage to the tear ducts, double vision, blindness, leakage of cerebrospinal fluid, and brain injury; it should not be used with people with diseases or conditions inaccessible to endoscopic procedures, for example lateral frontal sinus disease and stenosis of internal opening of frontal sinus.
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