Table 1.

Classification of rhinosinusitis

Infectious rhinosinusitis Viruses Bacteria Ichthyosporea Fungi Protozoa Non-infectious rhinosinusitis Allergic Non-allergic rhinitis and eosinophilia syndrome (NARES) Non-allergic, non-eosinophilic rhinitis Hormonal, emotional, food-related Gastro-oesophageal reflux disease Occupational (allergic/non-allergic) Drug-induced Aspirin Rhinitis medicamentosa Cocaine-induced midline destructive lesion Eosinophilic angiocentric fibrosis Rhinosinusitis associated with systemic diseases Diseases of muco-ciliary dysfunction Cystic fibrosis Primary ciliary dyskinesia Sarcoidosis Wegener's granulomatosis Churg–Strauss syndrome Relapsing polychondritis