Interruption of the inferior vena cava and azygos continuation in a child with partial atrioventricular septal defect.

Congenital pathologies of the inferior vena cava are uncommon. Isolated congenital interruption of the inferior vena cava with azygos vein continuation could be considered part of the group of venous return anomalies. The major significance of this anomaly is its association with complex cardiac defects and the associated technical difficulties at the time of cardiac catheterization and abdominal surgery or interventional procedures. In our case, we describe a common atrium and partial atrioventricular septal defect in an 8-year-old girl with infrahepatic interruption of the inferior vena cava and azygos continuation without polysplenia. Magnetic resonance angiography and computed tomography, together with a clinical awareness of this pathology, can be used to diagnose this entity.