What’s your diagnosis in this second trimester fetus?
Images courtesy of Firoz Bhuvar, MD
Right-sided aortic arch (normal variant)
The fetal aortic arch appears to the right of the trachea. In addition, the confluence of the aortic arch and the ductus arteriosus appears to be U-shaped and not V-shaped (as is the case in the normal left aortic arch).