Computed tomography scans of paranasal sinuses before functional endoscopic sinus surgery

Table 1 American Academy of Otolaryngology and Head and Neck Surgery criteria for chronic rhinosinusitis

Major criteria	Minor criteria
Purulence in nasal cavity	Headache
Facial pain, pressure, congestion, fullness	Fever (all nonacute)
Nasal obstruction, blockage, discharge, purulence	Halitosis
Fever (acute rhinosinusitis only)	Fatigue
Hyposmia/anosmia	Dental pain
	Cough
	Ear pain and fullness

Table 2 Indications for functional endoscopic sinus surgery

Chronic sinusitis refractory to medical treatment
Recurrent acute sinusitis
Nasal polyposis
Antrochoanal polyps
Sinus mucoceles
Excision of selected tumors
Cerebrospinal fluid leak closure
Orbital decompression (e.g. Graves ophthalmopathy)
Optic nerve decompression
Dacryocystorhinostomy
Choanal atresia repair