Prenatal Ultrasound Diagnosis of a Rare Vascular Ring Formed by Left Aortic Arch and Right Ductus Arteriosus: A Case Report

This first reported case of a rare vascular ring with a left aortic arch and a right ductus arteriosus confirmed by postmortem examination validates the diagnostic efficacy and accuracy of prenatal ultrasound, with the 3VT view serving as the key diagnostic plane, and highlights the need for genetic assessment in perinatal management.