- Abnormal bronchus arising directly from the lateral wall of the trachea (on either side, but right side is more common), supplying the upper lobes
- 0.1% - 2% incidence
- Most cases are found incidentally on bronchoscopy or CT
- Associated with other anomalies such as ribs, vertebrae
- Two types: displaced, or supernumerary
- "Displaced" type = RUL bronchus or any of its segmental bronchus in cephalad location than normal. If the entire RUL bronchus arises from tracheal wall, it is called "bronchus suis"
- "Supernumerary" type = normal RUL bronchus and its segmental bronchi but there is extra bronchus arising directly off the lateral wall of the trachea
- In children, it is associated with recurrent infections, stridor, respiratory distress and thoracic masses
- In adults, it can complicate endotracheal intubation (occlusion or accidental intubation of a tracheal bronchus can cause atelectasis)
Our case: supernumerary bronchus arising from the right lateral wall of the trachea. The patient presented with TB of the right upper lobe.
Aoun NY, et al. Tracheal bronchus. Respir Care 2004;49:1056-8.