label: Airway casts
label_lc: airway casts
description: "A replicate of airways from accumulated and condensed mucous and cellular material. These semisolid occlusions take the shape of the airway within they are formed, leading to obstruction of the tracheobronchial tree with consecutive respiratory insufficiency. Based on their principal composition, one can differentiate fibrin casts and mucin casts. Plastic bronchitis is the name of the condition characterized by the formation of airway casts."