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Diffuse panbronchiolitis
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Diffuse panbronchiolitis : ウィキペディア英語版
Diffuse panbronchiolitis

Diffuse panbronchiolitis (DPB) is an inflammatory lung disease of unknown cause. It is a severe, progressive form of bronchiolitis, an inflammatory condition of the bronchioles (small air passages in the lungs). The term ''diffuse'' signifies that lesions appear throughout both lungs, while ''panbronchiolitis'' refers to inflammation found in all layers of the respiratory bronchioles (those involved in gas exchange). DPB causes severe inflammation and nodule-like lesions of terminal bronchioles, chronic sinusitis, and intense coughing with large amounts of sputum production.
The disease is believed to occur when there is susceptibility, or a lack of immune system resistance, to DPB-causing bacteria or viruses, caused by several genes that are found predominantly in individuals of East Asian descent. The highest incidence occurs among Japanese people, followed by Koreans. DPB occurs more often in males, and usually begins around age 40. It was recognized as a distinct new disease in the early 1960s, and was formally named ''diffuse panbronchiolitis'' in 1969.
If left untreated, DPB progresses to bronchiectasis, an irreversible lung condition that involves enlargement of the bronchioles, and pooling of mucus in the bronchiolar passages. Daily treatment of DPB with macrolide antibiotics such as erythromycin eases symptoms and increases survival time, but the disease currently has no known cure. The eventual result of DPB can be respiratory failure and heart problems.
== Classification ==

The term "bronchiolitis" generally refers to inflammation of the bronchioles.〔 DPB is classified as a form of "primary bronchiolitis", which means that the underlying cause of bronchiolitis is originating from or is confined to the bronchioles.〔〔 Along with DPB, additional forms of primary bronchiolitis include bronchiolitis obliterans, follicular bronchiolitis, respiratory bronchiolitis, mineral dust airway disease, and a number of others.〔 Unlike DPB, bronchiolitis that is not considered "primary" would be associated with diseases of the larger airways, such as chronic bronchitis.〔〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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