Bronchiectasis

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Bronchiectasis (brong-ke-EK-ta-sis) is a condition in which damage to the airways causes them to widen and become flabby and scarred. The airways are tubes that carry air in and out of your lungs.

Bronchiectasis usually is the result of an infection or other condition that injures the walls of your airways or prevents the airways from clearing mucus. Mucus is a slimy substance that the airways produce to help remove inhaled dust, bacteria, and other small particles.

In bronchiectasis, your airways
slowly lose their ability to clear out mucus. When mucus can't be cleared, it builds up and creates an environment in which bacteria can grow. This leads to repeated, serious lung infections.

Each infection causes more damage to your airways. Over time, the airways lose their ability to move air in and out. This can prevent enough oxygen from reaching your vital organs.

Bronchiectasis can lead to serious health problems, such as respiratory failure, atelectasis (at-eh-LEK-tah-sis), and heart failure.

Bronchiectasis

Figure A shows a cross-section of the lungs with normal airways and with widened airways. Figure B shows a cross-section of a normal airway. Figure C shows a cross-section of an airway with bronchiectasis.

Overview

Bronchiectasis can affect just one section of one of your lungs or many sections of both lungs.

The initial lung damage that leads to bronchiectasis often begins in childhood. However, symptoms may not occur until months or even years after you start having repeated lung infections.

In the United States, common childhood infections—such as whooping cough and measles—used to cause many cases of bronchiectasis. However, these causes are now less common because of vaccines and antibiotics.

Now bronchiectasis usually is due to a medical condition that injures the airway walls or prevents the airways from clearing mucus. Examples of such conditions include cystic fibrosisand primary ciliary (SIL-e-ar-e) dyskinesia (dis-kih-NE-ze-ah), or PCD.

Bronchiectasis that affects only one part of the lung may be caused by a blockage rather than a medical condition.

Bronchiectasis can be congenital (kon-JEN-ih-tal) or acquired. Congenital bronchiectasis affects infants and children. It's the result of a problem with how the lungs form in a fetus.

Acquired bronchiectasis occurs as a result of another condition or factor. This type of bronchiectasis can affect adults and older children. Acquired bronchiectasis is more common than the congenital type.

Outlook

Currently, bronchiectasis has no cure. However, with proper care, most people who have it can enjoy a good quality of life.

Early diagnosis and treatment of bronchiectasis are important. The sooner your doctor starts treating bronchiectasis and any underlying conditions, the better your chances of preventing further lung damage.