The risks of functional endoscopic sinus surgery include but are not limited to bleeding infection as with any operation as well as risks associated with the location of the sinuses next to the eyes and the brain. Functional endoscopic sinus surgery fess is a minimally invasive surgical treatment which uses nasal endoscopes to enlarge the nasal drainage pathways of the paranasal sinuses to improve sinus ventilation this procedure is generally used to treat inflammatory and infectious sinus diseases . Paranasal sinus mucoceles biopsy of intranasal or paranasal sinus masses orbital surgery dcr orbital decompression optic nerve decompression biopsy of lesions of orbital apex treatment of selected nasal and paranasal tumors contraindications abnormalities of the skull base or orbit that prevent a safe approach to the sinuses. Endoscopic surgery of the paranasal sinuses and anterior skull base the current techniques applied at the skull base institute have allowed routine endoscopic management of benign and malignant sinonasal tumors and their extensions into the anterior skull base and the orbits. Endoscopic sinus surgery involves the use of a small telescope nasal endoscope that is inserted through the nostril to view your nose and sinuses the goal of the surgery is to identify the narrow channels that connect the sinuses to the nose enlarge these narrow openings channels and improve the drainage from the sinuses into the nose
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