If an anomaly is detected during a routine ultrasound, a fetal echocardiogram is performed to determine whether a fetus has the condition. Otherwise, it is often unnoticed unless an extenuating circumstance warrants further examination of the heart, usually much later in life. CT and MRI scans in a parasagittal section may show a "pipe" sign where the<unk><unk>  vena cava occurs.
Persistent left superior vena cava
Tracheal agenesis
Right-sided aortic arch
Congenital stenosis of vena cava
Aberrant subclavian artery
Persistent thyroglossal duct
Interrupted aortic arch
Overriding aorta