What causes bronchial casts?

Farzanna S. Haffizulla, MD
Farzanna S. Haffizulla, MD on behalf of MDLIVE
Internal Medicine
Bronchial casts are often large, thick, tenacious mucus "molds or impressions" of the inner lining of the bronchial tubes of our lungs. They can occur as a result of allergic inflammation, infection, or excessive reactivity to the presence of a foreign body or chemicals. They can be "expectorated" or coughed up by the patient but if they remain in the bronchial  tubes they cause chest pain, shortness of breath and hypoxemia (low blood oxygen levels).

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