A case of bronchial cast.

We report a case of bronchial cast in a boy 1 year and 5 months old. Bronchial casts often obstruct the main bronchi, causing dyspnea and hypoxia. The bronchial cast was studied pathologically, with findings of eosinophilia and neutrophilic infiltration; the cast seemed to involve an allergic reaction. Such casts can be removed during bronchoscopy, but we used aspiration.