What are the causes and symptoms of renal vein thrombosis?
In children, renal vein thrombosis almost always occurs rapidly after an episode of severe dehydration. Severe dehydration decreases blood volume and causes the blood to clot more readily. In adults, renal vein thrombosis can be caused by injury to the abdomen or back, as a result of malignant kidney tumors growing into the renal vein, or as a result of kidney diseases that cause degenerative changes in the cells of the renal tubules (nephrotic syndrome). Acute onset of renal vein thrombosis at any age causes pain in the lower back and side, fever, bloody urine, decreased urine output, and sometimes kidney failure. In adults, when the onset of the disorder is gradual, there is a slow decrease in kidney function, and protein appears in the urine. Many adults with renal vein thrombosis show few symptoms. Source: The Gale Group.
