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Absent ductus venosus

Agenesis of the ductus venosus (ADV) is an extremely rare anomaly.

Pathology

There can be at least four main patterns of abnormal venous circulation when the ductus venosus is absent 4-5

  • the umbilical vein (UV) bypasses the liver and drains into the right atrium directly or through a dilated coronary sinus : conisdered the commonest type and carries worst prognosis due to risk of developing congestive cardiac failure11.
  • the UV bypasses the liver, with an infrahepatic or suprahepatic connection directly to the inferior vena cava (IVC)
  • the UV bypasses the liver and drains directly into the iliac or renal veins   
  • the UV drains directly into the portal veins
Associations

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