Nasal polyposis.

Nasal polyps are the most common tumors arising in the nasal cavities. They are thought to affect between 1% and 4% of the population. Various conditions predispose to nasal polyp formation, and the mechanisms of these associations are in some instances still undefined. We herein present current theories on the etiology and pathophysiology of this entity and discuss current recommendations with regard to medical and surgical treatment of the disease.