<prompt> Indications of FESS -a Inverted papilloma b Nasal Allergic polyposisc Mucoceled Ca maxillaabbcacdabc  <response>: Indications of FESS Chronic bacterial sinusitis unresponsive to adequate medical treatment.Recurrent acute bacterial sinusitis.Polypoid rhinosinusitis diffuse nasal polyposis.Fungal sinusitis with fungal ball or nasal polypi.Antrochoanal polyp and Ethmoid polypMucocele of frontoethmoid or sphenoid sinus.Control of epistaxis by endoscopic cautery.Removal of foreign body from the nose or sinus.Endoscopic septoplasty.Removal of benign tumours, e.g. inverted papillomas or angiofibromas.Orbital abscess or cellulitis management.Dacryocystorhinostomy.Repair of CSF leak.Pituitary surgeryOptic nerve decompression.Orbital decompression for Graves disease.Control of posterior epistaxis endoscopic clipping of sphenopalatine artery.Choanal atresia. 