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www.reference.com/article/lung-fibrosis-bcda28c08fafc73c

Lung fibrosis, or pulmonary fibrosis, takes place when damaged and scarred tissue in the lung causes it to dysfunction, explains Mayo Clinic. The cause of lung fibrosis is unknown as of 2015, and the lung damage is irreparable.

www.reference.com/article/fibrosis-1d69a79f25bc8b4a

Fibrosis refers to the formation of fibrous tissue, according to The Free Dictionary. An example is congenital hepatic fibrosis, in which the liver forms wide bands of fibrous tissue in an irregular pattern. The tissue contains cysts from faulty terminal bile ducts and leads to constricted blood flo

www.reference.com/article/causes-fibrosis-3f02f1cc44169de7

Causes of pulmonary fibrosis include environmental factors, radiation treatments, certain medications and medical treatments. In most cases, however, no known cause is discovered, according to Mayo Clinic.

www.reference.com/article/cystic-fibrosis-lung-disease-b9dbb6e1b1df23eb

Cystic fibrosis is a genetic disease in which a mutation causes bodily secretions, such as mucus, digestive juices and sweat, to have a thick, sticky consistency rather than a thinner, more slippery quality, explains Mayo Clinic. In healthy individuals, these secretions serve as a lubricant for the

www.reference.com/article/pulmonary-fibrosis-469e1a424cb6eadd

According to WebMD, pulmonary fibrosis is described as scarring that occurs in the lungs. The resulting thickened lung tissue makes it hard for lungs to properly function. According to Mayo Clinic, the lung damage incurred cannot be fixed; however, some treatments and therapies may be effective at c

www.reference.com/article/symptoms-pulmonary-fibrosis-98bc8df33ee6ae50

Symptoms of pulmonary fibrosis include shortness of breath, dry cough, fatigue, unexplained weight loss and aching muscles and joints, according to the Mayo Clinic. However, symptoms and progression of the disease vary from person to person.

www.reference.com/article/cystic-fibrosis-1e809b33e7cf1c27

Cystic fibrosis is a disorder in which a person possesses a defective gene that causes mucus, sweat and digestive juices to be thick and sticky rather than thin and slippery, explains Mayo Clinic. The thick and sticky secretions can block tubes and ducts in organs such as the lungs and pancreas.

www.reference.com/article/cystic-fibrosis-disease-d4a13c3258e91fb

Cystic fibrosis thickens mucus, digestive juice and sweat to cause serious damage to the lungs and digestive system, states Mayo Clinic. Cystic fibrosis is an inherited condition.

www.reference.com/article/symptoms-cystic-fibrosis-8cfb32c2cd95767f

Symptoms of cystic fibrosis vary widely, and include slow growth in children, a chronic cough, sometimes producing phlegm, rectal prolapse, greasy stools, breathing difficulties and nasal passage inflammation, as stated by Mayo Clinic. Cystic fibrosis affects the digestive and respiratory systems, p

www.reference.com/article/causes-cystic-fibrosis-b09ddd048e01123b

According to WebMD, cystic fibrosis is a hereditary disease. As the National Heart, Lung, and Blood Institute explains, the disease is caused by a defect in the CFTR gene that controls the movement of water and salt in and out of cells. In people with cystic fibrosis, the CFTR gene makes protein tha