Renal papillary necrosis
Renal papillary necrosis is a disorder of the kidneys in which all or part of the renal papillae die. The renal papillae are the areas where the openings of the collecting ducts enter the kidney, and where the urine flows into the ureters.
Alternative Names
Necrosis - renal papillae; Renal medullary necrosis
Causes, incidence, and risk factors
Renal papillary necrosis usually occurs with analgesic nephropathy
. However, a number of other conditions can cause it, including:
Sickle cell anemia is a common cause of renal papillary necrosis in children.
Symptoms
Tissue death (necrosis
) of the renal papillae may make the kidney unable to concentrate the urine. Symptoms may include:
Other symptoms that may ocur with this disease:
Signs and tests
The area over the affected kidney (in the flank) may feel tender during an exam. There may be a history of urinary tract infections. There may be signs of obstructive uropathy
or kidney failure.
A urinalysis
may show infection or dead tissue in the urine.
An intravenous pyelogram
(IVP) may show a blockage or tissue in the renal pelvis or ureter.
Treatment
There is no specific treatment for renal papillary necrosis. Treatment depends on the cause. For example, if analgesic nephropathy is the cause, your doctor will recommend that you stop using the medicine that is causing it. This may allow the kidney to heal over time.
Expectations (prognosis)
How well a person does depends on what is causing the condition. If the cause can be controlled, the condition may go away on its own. In some cases, persons with this condition develop kidney failure and will need dialysis or a kidney transplant.
Calling your health care provider
Call for an appointment with your health care provider if:
Prevention
Controlling diabetes or sickle cell anemia may reduce your risk. To prevent renal papillary necrosis from analgesic nephropathy, be careful when using medications, including over-the-counter pain relievers.
References
Kanso AA, Abou Hassan NM, 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.
Porter CC, Ayner Ed. Hematologic diseases causing hematuria. In: Kliegman RM, Stanton BF, St. Geme JW III. Schor NF, Behrman RE, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 514.
Updated: 9/20/2011
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.