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February 9, 2010
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Pneumothorax
(Collapsed Lung)

Medical Revising Authors and Editor: George Schiffman, MD, and Melissa Conrad Stoppler, MD

What is a pneumothorax?

A pneumothorax is a collection of free air in the chest outside the lung that causes the lung to collapse.

What are the types of pneumothorax?

A spontaneous pneumothorax, also referred to as a primary pneumothorax, occurs in the absence of a traumatic injury to the chest or a known lung disease. A secondary (also termed complicated) pneumothorax occurs as a result of an underlying condition.

Picture of Pneumothorax (Collapsed Lung)

What causes a pneumothorax?

Spontaneous pneumothorax is caused by a rupture of a cyst or a small sac (bleb) on the surface of the lung. Pneumothorax may also occur following an injury to the chest wall such as a fractured rib, any penetrating injury (gun shot or stabbing), surgical invasion of the chest, or may be deliberately induced in order to collapse the lung. A pneumothorax can also develop as a result of underlying lung diseases, including cystic fibrosis, chronic obstructive pulmonary disease (COPD), lung cancer, asthma, and infections of the lungs.



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Pneumothorax

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Bronchitis is a term that describes inflammation of the bronchial tubes (bronchi and the smaller branches termed bronchioles) that results in excessive secretions of mucus into the tubes, leading to tissue swelling that can narrow or close off bronchial tubes. Bronchial tubes extend from the trachea and terminate at the alveoli in the lungs; the bronchial system resembles an inverted tree and is sometimes termed the "bronchial tree." A few authors include the trachea and upper airway in the definition. There are two major types of bronchitis, acute and chronic.

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