Absent right SVC with PLSVC

28 years old female referred by obstetrician for anomaly scan at 19 weeks of gestation.  

Findings and discussion:

On B mode ultrasound image and cine:

Normal four chamber view is seen, where two atria and two ventricles were normal in size and thickness.

The two atrioventricular valves moved normally without any evidence of TR.

The pulmonary and aortic valve appears normal.

Two great arteries arose normally from the appropriate ventricle.

On 3 vessel trachea view (3VTV): V sign documented on B mode , representing pulmonary artery and aorta; But the SVC is seen on left of PA instead of right. Right SVC is absent. 

Coronary sinus appears dilated.

On Color Doppler images and cine: left sided SVC is seen with right brachiocephalic vein.

So, the diagnosis of Absent right SVC with PLSVC is given.