into the dilated left renal vein (arrowhead) and the normal right inferior vena cava (open arrowhead). The embryologically paired superior cardinal veins normally form the SVC on the right and the ...

It is the lower, or inferior, part of the vena cava—a large vein also made up of the superior vena cava that carries blood from the head, neck, arms, and chest in the upper body to the heart.