Anomalous Origin of Left Pulmonary Artery from Ascending Aorta, Right Aortic Arch and Right Patent Ductus Arteriosus

A case of anomalous left pulmonary artery (ALPA) arising from the ascending aorta, a right aortic arch and a right patent ductus arteriosus, a combination not previously reported, is described. Current concepts regarding the genesis of an ALPA also predict main pulmonary artery hypoplasia and defects of the ventricular septum. These associated defects were not present in our patient Their absence suggests that the developmental faults associated with these abnormalities are even more complex than previously suspected. The need for early diagnosis and the efficacy of surgical correction are emphasized.