Agenesis of the vena cava

Agenesis of the vena cava is a genetic defect of the inferior vena cava. It comes about when, during development of the foetus, the right subcardinal vein does not connect as it should to the hepatic sinusoids.: 628.
Agenesis of the superior vena cava may also occur; it is very rare.

Renal agenesis and other reduction defects of kidney Q60.0 Renal agenesis unilateral Q60.1 Renal agenesis bilateral Q60.2 Renal agenesis unspecified
The right external iliac vein can similarly be compressed. Such compressions may contribute to deep vein thrombosis. Failure to develop or agenesis of
arterioles that supply the glomeruli. Blood drains from the kidneys, ultimately into the inferior vena cava After filtration occurs, the blood moves through
Incontinentia pigmenti Infant respiratory distress syndrome Inferior vena cava syndrome Infertility in polycystic ovary syndrome Influenza - like illness

B. Binger, L. C. 1991 Arm anomalies: Cases of supernumerary development and bilateral agenesis of arm pairs in Octopoda Mollusca, Cephalopoda