Nasal Polyp

A noncancerous, fleshy growth within the interior NOSE. Polyps are outgrowths of the mucous membrane and extend from the membrane on a stemlike projection called a pedicle. Polyps have a rich BLOOD supply and bleed easily. Because of this and because there is a chance for them to become cancerous over time, doctors prefer to surgically remove them. Nasal polyps that form in the air passages and SINUSES can obstruct the flow of air, interfering with BREATHING. Chronic irritation (such as from ALLERGIC RHINITIS) and INFECTION (such as SINUSITIS) seem to encourage the growth of polyps; treating the underlying conditions helps prevent polyps from recurring. Multiple nasal polyps are common in people who have CYSTIC FIBROSIS.