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Figure 4. A 13-month-old boy with pulmonary sling anomaly and tracheal bronchus (pig bronchus). (a–c) Axial consecutive CT images show the anomalous left pulmonary artery (arrow) which arises from the right pulmonary artery and passes to the left behind the trachea (t). In the same patient, (d) coronal multiplanar and (e) three-dimensional volume-rendered reformations show the tracheal bronchus (arrow) arising from the right lateral wall of the trachea just above the carina and directed toward the right upper lobe. Note that all images show narrowing of the trachea (t) at the level of the anomalous left pulmonary artery coursing to the left.
