A supernumerary bronchus of the right upper lobe.

A patient with a bronchogenic carcinoma in the right lower lobe was found during bronchography to have an accessory right superior cardiac bronchus. Inspection of the right lung at operation and a control bronchogram, made 6 months after right lower lobectomy, confirmed that the congenital anomaly was a supernumerary bronchus and not a cardiac bronchus which had migrated proximally.