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A 6-month-old female with a lifelong history of respiratory distress became increasingly difficult to manage and required right upper and middle pulmonary lobectomies for worsening emphysema and mediastinal shift. The postoperative course was stormy and confusing and the patient died despite emergency tracheostomy. The autopsy disclosed an anomalous bronchus to the right lower lobe, originating from the left mainstem bronchus. In addition, the left main pulmonary artery was positioned posterior to the left mainstem bronchus. Two other cases of bridging bronchus have been reported, but the association with posterior left pulmonary artery has not been described.