Crossed pulmonary arteries associated with interruption of aortic arch on three-dimensional computed tomographic imaging.

FE A T U R E A R T IC LE S Anewborn boy, weighing 2.6 kg, was referred to our facility on the second day of life for suspected interruption of aortic arch (IAA) with ductal shock, presenting with severe respiratory and circulatory distress. He was intubated and immediately given a prostaglandin infusion. An echocardiogram defined a large ventricular septal defect, type B IAA with a closing patent ductus arteriosus (PDA), and then revealed malposed origin of the pulmonary arteries. After the patient recovered from transient renal failure, 3-dimensional computed tomography (Somatom Definition, Siemens Medical Systems, Forchheim, Germany) imaging confirmed the diagnosis of type B IAA (Fig 1; left panel, posterior view; right panel, sagittal section view; AAo ascending aorta; DAo descending aorta; mPA main pulmonary artery) and clearly depicted demonstrative features of crossed pulmonary arteries (Fig 2; left panel, cross section view; right panel,