Right aortic arch with anomalous left subclavian artery and left-sided patent ductus arteriosus (vascular ring) in an extremely low-birth-weight infant.

We present three-dimensional reconstructed images of the vascular ring of a 4-day-old extremely premature neonate which were obtained utilizing multidetector computer tomography. This is a unique case of early detection of Kommerell's diverticulum and vascular ring in an extremely low-birth-weight infant using this noninvasive technology.