Most cases of renal vein thrombosis resolve without any permanent damage. Death from renal vein thrombosis is rare,

Renal vein thrombosis develops when a blood clot forms in the renal vein, which carries blood from the kidneys back to the heart. The disorder is not common.

There is no specific prevention for renal vein thrombosis. Preventing dehydration reduces the risk that it will occur.

Renal venography, where a contrast material (dye) is injected into the renal vein before x rays are taken, is one of the best ways to detect renal vein thrombosis.

In children, renal vein thrombosis almost always occurs rapidly after an episode of severe dehydration.