Changes

**[[Lungs Ventilation - Pathology#Emphysema|Interstitial emphysema]]  

**[[Lungs Ventilation - Pathology#Emphysema|Interstitial emphysema]]  

***More prominent in the caudal lung lobes

***More prominent in the caudal lung lobes

***Results from bronchoconstriction which results in airway obstruction - this constriction is thought to arise from [[Mast Cells - WikiBlood|mast cell]] degranulation and histamine release

***Results from bronchoconstriction which results in airway obstruction - this constriction is thought to arise from [[Mast Cells|mast cell]] degranulation and histamine release

*Histologically

*Histologically

**[[Bronchi and Bronchioles Inflammatory - Pathology#Acute bronchitis/bronchiolitis|Acute bronchiolitis]], characteristic of the bronchiolar response is the formation of syncytial giant cells  (formed by proliferating bronchiolar epithelial cells which may contain [[Degenerations and Infiltrations - Pathology#Cellular Inclusions|intracytoplasmic inclusion bodies]]), alveolar epithelium sometimes affected

**[[Bronchi and Bronchioles Inflammatory - Pathology#Acute bronchitis/bronchiolitis|Acute bronchiolitis]], characteristic of the bronchiolar response is the formation of syncytial giant cells  (formed by proliferating bronchiolar epithelial cells which may contain [[Degenerations and Infiltrations - Pathology#Cellular Inclusions|intracytoplasmic inclusion bodies]]), alveolar epithelium sometimes affected