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Renal vein thrombosis

Definition

Renal vein thrombosis is a blood clot that develops in the vein that drains blood from the kidney.

Alternative Names

Clot in the renal vein; Occlusion - renal vein

Causes, incidence, and risk factors

Renal vein thrombosis is an uncommon disorder that may be caused by:

In adults, the most common cause is nephrotic syndrome. In infants, the most common cause is dehydration.

Symptoms

Signs and tests

An examination may not reveal the specific problem, but may indicate nephrotic syndrome or other causes of renal vein thrombosis.

Treatment

The treatment is focused on preventing new clot formations and reducing the risk of the clot traveling to other locations in the body (embolization).

You may get medications that prevent blood clotting (anticoagulants) to stop new clots from forming. Your doctor may recommend bedrest or limited activity for a brief period.

If severe acute renal failure develops, you may need dialysis, but it should be temporary.

Expectations (prognosis)

Renal vein thrombosis usually gets better over time without permanently injuring the kidneys.

Complications

  • Acute renal failure (especially if thrombosis occurs in a dehydrated child)
  • Blood clot moves to the lungs (pulmonary embolism)
  • Formation of new blood clots

Calling your health care provider

Call your health care provider if you have symptoms of renal vein thrombosis.

If you have experienced renal vein thrombosis, call your health care provider if you develop decreased urine output, difficulty breathing, or other new symptoms.

Prevention

There is no specific prevention for renal vein thrombosis in most people. Keeping enough fluids in the body to avoid dehydration may help reduce its risk.

In people who have had a kidney transplant, aspirin is sometimes used to prevent renal vein thrombosis. In people with certain chronic kidney diseases, blood thinners such as warfarin may be recommended.

References

DuBose TD Jr, Santos RM. Vascular disorders of the kidney. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 126.

Kanso AA, Hassan NMA, Badr KF. Microvascular and macrovascular diseases of the kidney. In: Brenner BM, ed. Brenner and Rector's The Kidney. 8th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 32.


Review Date: 6/8/2011
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Herbert Y Lin, MD, PhD, Nephrologist, Massachusetts General Hospital; Associate Professor of Medicine, Harvard Medical School. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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