interstitial lung disorder


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interstitial lung disorder

,

ILD

Any of a large group of diseases with different causes but with the same or similar clinical and pathological changes. These are due to chronic, nonmalignant, noninfectious diseases of the lower respiratory tract characterized by inflammation and disruption of the walls of the alveoli. This manifests clinically as a limitation in the ability of the lungs to transfer oxygen from the alveoli to the pulmonary capillary bed. Patients with these disorders are dyspneic first in connection with exercise and, later, as the disease progresses, even at rest.

Approximately 180 different types of ILD exist, many of which are poorly understood. Known causes include inhalation of irritating or toxic environmental agents such as organic dusts, fumes, vapors, aerosols, and inorganic dusts; drugs; radiation; aspiration pneumonia; and the consequences of acute respiratory distress syndrome. See: idiopathic pulmonary fibrosis

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Diffuse alveolar damage: a common phenomenon in progressive interstitial lung disorders. Pulm Med 2011; 2011: 531302.
As noted, some cases of asbestosis resemble UIP, while others resemble fibrotic nonspecific interstitial pneumonitis, (115) but in general, the presence of readily identified asbestos bodies permits the distinction of asbestosis from these other interstitial lung disorders. As noted above, the presence of frequent fibroblast foci is against a diagnosis of asbestosis.

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