<unk>  is aberrant bronchus that arises from the right<unk>  wall above the carina. It Results from an additional<unk>  outgrowth early in embryonic life. Incidence ranges between 0.1 and 5%. Occasionally, it causes persistent or recurrent pneumonia. It is associated with other bronchopulmonary anomalies,<unk>  stenosis, or  Down's syndrome.
Pig snout
Pig snout
Tracheal bronchus
Secondary bronchus
Bronchiole
Bronchus
Tertiary bronchus
Left main bronchus
Phrenic nerve
Mediastinum