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Pulmonary Fibrosis

Medical Author (Revision): George Schiffman, M.D.
Medical Editor (Revision): Melissa Conrad Stoppler, MD

What is pulmonary fibrosis?

"Fibrosis" is a term used to refer to scarring, so pulmonary fibrosis means scarring throughout the lungs. Pulmonary fibrosis can be caused by many conditions including chronic inflammatory processes (sarcoidosis, Wegener's granulomatosis ), infections, environmental agents (asbestos, silica, exposure to certain gases), exposure to ionizing radiation (such as radiation therapy to treat tumors of the chest), chronic conditions (lupus, rheumatoid arthritis), and certain medications.

In a condition known as hypersensitivity pneumonitis, fibrosis of the lung can develop following a heightened immune reaction to inhaled organic dusts or occupational chemicals. This condition most often results from inhaling dust contaminated with bacterial, fungal, or animal products.

In some people, chronic pulmonary inflammation and fibrosis develop without an identifiable cause. Most of these people have a condition called idiopathic pulmonary fibrosis (IPF) that does not respond to medical therapy, while some of the other types of fibrosis, such as nonspecific interstitial pneumonitis (NSIP), may respond to immune suppressive therapy.

Synonyms (other names) for various types of pulmonary fibrosis that have been used in the past include chronic interstitial pneumonitis, Hamman-Rich Syndrome, and diffuse fibrosing alveolitis.



Next: What are pulmonary fibrosis symptoms? »

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Pulmonary Fibrosis

What are the lungs?

The lungs are a pair of organs in the chest, which are primarily responsible for the exchange of oxygen and carbon dioxide between the air we breathe and the blood.

What does breathing accomplish?

The cells in the body constantly need a new supply of oxygen to produce energy. With lack of oxygen, cellular function is impaired and damage or cell death may occur. As energy is utilized, waste products are created, one of which is the gas carbon dioxide. Eliminating carbon dioxide from the body is just as important as breathing in oxygen from the air. If carbon dioxide builds up in the blood it will lead to headaches, drowsiness, coma, and eventually even death.

What is the structure of the respiratory system?

Air enters the body via the nose (preferably) or the mouth. The air enters the main windpipe, called the trachea, and continues en route to each lu...

Read the Lungs Design And Purpose article »









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