Obstruction of the inferior vena cava above the renal veins.
D006801:Humans; D007668:Kidney / Q000502:physiology*; D012082:Renal Veins; D035423:Thoracic Cavity; D014682:Vena Cava, Inferior; D014684:Venae Cavae / Q000601:surgery*
KIDNEYS/physiology; VENAE CAVAE/surgery