Nasal Polyposis: A Review

Nasal polyp is a benign lesion that arises from the mucosa of the nasal sinuses or from the mucosa of the nasal cavity as a macroscopic edematous mass. The exact etiology is still unknown and controversial, but it is assumed that main causes are inflammatory conditions and allergy. It is more common in allergic patients with asthma. Interleukin-5 has found to be significantly raised in nasal polyps. The patients usually present with nasal obstruction, rhinorrhea and postnasal drip. Magnetic resonance imaging is suggested, particularly to rule out serious conditions such as neoplasia. Histopathological examination is also suggested to rule out malignancy and for definite diagnosis.