Patent Ductus Arteriosus in a Fetus with Truncus Arteriosus and Non-Interrupted Aortic Arch.

Truncus arteriosus most often has absence of a patent ductus arteriosus unless there is concomitant aortic arch interruption. To date, there are no reports of fetal echocardiography visualizing a patent ductus arteriosus in truncus arteriosus without arch interruption. Here, we present the case of a fetus prenatally diagnosed with truncus arteriosus type 1 with a patent ductus arteriosus noted on fetal echocardiography. Visualizing this in-utero allowed for proper surgical planning and ligation during truncus arteriosus repair and excellent outcome.