<prompt> FESS means:Factual endoscopic sinus surgeyFunctionl endonasal sinus surgeryFactual endonasal sinus surgeryFunctionl endoscopic sinus surgery  <response>: Indications ofFESSi Chronic bacterial sinusitis unresponsive to adequate medical treatment.ii Recurrentacutebacteridsinusitis.iii Polypoid rhinosinusitis diftrse nasal polyposisw Fungal sinusitis with fungal ball or nasal polypiv Antrochoanal polyp and Ethmoid polypvi Mucocele of frontoethmoid or sphenoid sinus.vii Control of epistaxis by endoscopic cautery.viii Removal of foreign body from the nose or sinusix EndoscoPicsePtoPlastY.x Removal of benign tumours, e.g. inveedpapillomas or anofibromas.xi Orbital abscess ot cellulltls nonageme,tt.xii DacryocYstorhinostomY.:lolii RepaltofCSFleak,xiv Pituitarysurgeryxv Optic nerve decomPression.xvi Orbitd decompression for Graves disease-xvii Control ofposterior epistaxisendoscopicclipping ofsphenopalatine aery.xviii Choanal atresia. 