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CA26 Chronic bronchiolitis

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01

Bronchiolitis and bronchiolitis obliterans are general terms used to describe a nonspecific inflammatory injury that primarily affects the small airways and generally spares the interstitium. Bronchiolitis may be caused by inhalation injury, infection, or drugs; associated with organ transplantation or connective tissue disease; or may be idiopathic. The main pathologic categories of bronchiolitis are: constrictive, proliferative, follicular, airway-centred interstitial fibrosis, and diffuse panbronchiolitis. The constrictive and proliferative patterns may occur together.

sections/codes in this section (CA26-CA26)

• Chronic obliterative bronchiolitis  (CA26.0)
• Diffuse panbronchiolitis  (CA26.1)
• Other specified chronic bronchiolitis  (CA26.Y)
• Chronic bronchiolitis, unspecified  (CA26.Z)

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