Endoscopic and imaging techniques in the diagnosis of chronic rhinosinusitis.

The definition of chronic rhinosinusitis globally applies to any patient who has nasal and/or sinus inflammatory disease for a period of more than 3 months, provided the patient has particular signs and symptoms. However, to treat chronic rhinosinusitis appropriately, specific etiologies must be diagnostically ruled in or out. Chronic rhinosinusitis can be complex, because there are several factors involved in its causation. Endoscopy and imaging can play a role in helping to lead to a more specific diagnosis, allowing more targeted treatment.