Nasal polyps are fleshy outgrowths of the mucous membrane of the nose.
Polyps are common teardrop-shaped growths that form around the openings to the sinus cavities. A mature polyp resembles a peeled, seedless grape. Unlike polyps in the colon or bladder, polyps in the nose are not tumors and do not suggest an increased risk of cancer. They are merely a reflection of inflammation, although there may be a family history of the problem. The doctor may perform a biopsy of the polyp to ensure that it is not a cancer.
Polyps may develop during infections and may disappear after the infection subsides, or they may begin slowly and persist. Nasal polyps also can form if a foreign body is in the nose. Some people who are allergic to aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs—see Pain: Nonsteroidal Anti-Inflammatory Drugs) have a combination of asthma, chronic nasal and sinus congestion, and nasal polyps. It is not clear how the nasal polyps are related to the allergy and the other respiratory tract symptoms. People with nasal polyps can develop sinus infections if the polyps block drainage from the sinuses.
Many people are not aware that they have nasal polyps, although they may have sneezing, nasal congestion, obstruction, drainage of fluid down the throat (postnasal drip), facial pain, excessive discharge from the nose, loss of smell (anosmia), reduced ability to smell (hyposmia), itching around the eyes, and chronic infections.
Corticosteroids in the form of nasal sprays or oral tablets may shrink or eliminate polyps. Endoscopic surgery or oral corticosteroids are needed if polyps block the airways or cause frequent sinus infections. Polyps tend to grow back unless the underlying irritation, allergy, or infection is controlled. Using an aerosol corticosteroid spray may slow recurrences. However, a doctor may need to examine the person periodically with nasal endoscopy (looking in the nose with a small rigid or flexible viewing tube) to evaluate and treat persistent or recurring problems.
Last full review/revision October 2012 by Marvin P. Fried, MD