CTICasesBilateral Ductus Arteriosus (with Atresia of Right Pulmonary Artery Connection)
Imaging findings
Neonate chest radiograph shows cardiomegaly and right upper lobe bronchial origin anomaly. Cardiac MRI at day 6 of life demonstrates a normal left-sided arch branching, a patent left ductus arteriosus, but the segment of the right pulmonary artery (RPA) connecting to the main pulmonary artery (MPA) is absent; instead, a right-sided patent ductus arteriosus arises from the right brachiocephalic artery to supply the entire right lung.
Key takeaways
Bilateral ductus arteriosus is a rare congenital anomaly where a segment connecting the MPA to one of the pulmonary branches is atretic or absent, with that pulmonary branch instead supplied by a ipsilateral ductus. This condition is often misdiagnosed as proximal interruption of the pulmonary artery (PIPPA) when the ductus regresses after birth.
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