A bridging bronchus is a rare congenital bronchial anomaly where there is an anomalous bronchus to the right lung arising from the left main bronchus. It has a high association with right upper lobe bronchus (pig bronchus) and congenital cardiac and vascular malformations, particularly a left pulmonary artery sling.
The diagnosis is usually made in infants with respiratory distress, wheeze, chronic coughing or stridor. Patients may also present with apnea, cyanosis, or severe upper airway obstruction. Complications include recurrent pneumonia and chronic atelectasis.
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