bronchiolitis fibrosa obliterans


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bron·chi·ol·i·tis fi·bro·sa ob·li·te·rans

obstruction of bronchioles and alveolar ducts by fibrous granulation tissue induced by mucosal ulceration; the condition may follow inhalation of irritant gases (see silo-filler's lung) or may complicate pneumonia; associated with obstructive findings (see unilateral hyperlucent lung, Swyer-James syndrome).

bron·chi·o·li·tis fi·bro·sa ob·li·te·rans

(brong'kē-ō-lī'tis fī-brō'să ob-lit'ĕr-anz, brong'kē-ō-lī'tis ob-lit'ĕr-anz)
Obstruction of bronchioles and alveolar ducts by fibrous granulation tissue induced by mucosal ulceration; the condition may follow inhalation of irritant gases (i.e., silo-filler's lung) or may complicate pneumonia (i.e., BOOP); associated with obstructive findings (i.e., unilateral hyperlucent lung, Swyer-James syndrome).

bronchiolitis

inflammation of the bronchioles; bronchopneumonia. See also chronic obstructive pulmonary disease.

catarrhal bronchiolitis
acute, mild irritation of the mucosa with excess mucus production, necrosis of epithelial cells, and transient exudation of leukocytes into the lumen.
chronic bronchiolitis-emphysema complex, horses
see chronic obstructive pulmonary disease.
bronchiolitis fibrosa obliterans
see obliterative bronchiolitis (below).
obliterative bronchiolitis
response to necrosis of the lining epithelium at the bronchiolar-alveolar junction and subsequent fibroblastic organization of the fibrin exudation, obliterating the bronchiolar lumen.
purulent bronchiolitis
more severe than catarrhal; a viscid exudate characterized by a predominance of neutrophils, with mucus and sloughed epithelial cells.
ulcerative bronchiolitis
inflammation characterized by the loss of large areas of epithelium with exposure of the underlying tissue and the development of ulcers.
vesicular bronchiolitis
bronchopneumonia.