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</div><div><span>Urinary casts</span></div></div>
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</a><h1 class="with-also" itemprop="name">Urinary casts</h1>
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</noscript></div><div class="main"><div id="ency_summary"><p>Urinary casts are tiny tube-shaped particles that can be found when urine is examined under the microscope during a test called <a test="test" href="./003579.htm">urinalysis</a>.</p><p>Urinary casts may be made up of white blood cells, red blood cells, kidney cells, or substances such as protein or fat. The content of a cast can help tell your health care provider whether your kidney is healthy or abnormal.</p></div><section><div class="section"><div class="section-header"><div class="section-title"><h2>How the Test is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-1" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-1"><p>The urine sample you provide may need to be from your first morning urination. The sample needs to be taken to the lab within 1 hour.</p><p>A <a test="test" href="./007487.htm">clean-catch urine sample</a> is needed. The clean-catch method is used to prevent germs from the penis or vagina from getting into a urine sample. To collect your urine, the provider may give you a special clean-catch kit that contains a cleansing solution and sterile wipes. Follow instructions exactly so that the results are accurate.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>How to Prepare for the Test</h2></div><div class="section-button"><button type="submit" aria-controls="section-2" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-2"><p>No special preparation is needed.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>How the Test will Feel</h2></div><div class="section-button"><button type="submit" aria-controls="section-3" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-3"><p>The test involves only normal urination. There is no discomfort.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Why the Test is Performed</h2></div><div class="section-button"><button type="submit" aria-controls="section-4" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-4"><p>Your provider may order this test to see if your kidneys are working properly. It may also be ordered to check for certain conditions, such as: </p><ul><li><a test="test" href="./000484.htm">Glomerular disease</a></li><li><a test="test" href="./000464.htm">Interstitial kidney disease</a></li><li>Kidney infections </li></ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Normal Results</h2></div><div class="section-button"><button type="submit" aria-controls="section-5" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-5"><p>The absence of cellular casts is normal. The presence of a few hyaline casts is also normal. Hyaline casts are the most common type of urinary casts. They're made up of a protein call uromodulin and are often the result of conditions such as dehydration and strenuous exercise, as well as chronic kidney failure.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>What Abnormal Results Mean</h2></div><div class="section-button"><button type="submit" aria-controls="section-6" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-6"><p>Abnormal results may include:</p><ul><li>Fatty casts are seen in people who have lipids in urine. This is most often a complication of <a test="test" href="./000490.htm">nephrotic syndrome</a>.</li><li>Granular casts are a sign of many types of kidney diseases.</li><li>Red blood cell casts mean there is a microscopic amount of bleeding from the kidney. They are seen in many kidney diseases.</li><li>Renal tubular epithelial cell casts reflect damage to tubule cells in the kidney. These casts are seen in conditions such as <a test="test" href="./000512.htm">renal tubular necrosis</a>, viral disease such as <a test="test" href="./000568.htm">cytomegalovirus (CMV) nephritis</a>, and kidney <a test="test" href="./000815.htm">transplant rejection</a>.</li><li>Waxy casts can be found in people with advanced kidney disease and <a test="test" href="./000471.htm">long-term (chronic) kidney failure</a>.</li><li>White blood cell (WBC) casts are common with acute kidney infections and interstitial nephritis. </li></ul><p>Your provider will tell you more about your results.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Risks</h2></div><div class="section-button"><button type="submit" aria-controls="section-7" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-7"><p>There are no risks with this test.</p></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>Alternative Names</h2></div><div class="section-button"><button type="submit" aria-controls="section-Alt" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Alt"><p>Hyaline casts; Granular casts; Renal tubular epithelial casts; Waxy casts; Casts in the urine; Fatty casts; Red blood cell casts; White blood cell casts</p></div></div></section><section><div class="section sec-mb"><div class="section-header"><div class="section-title"><h2>Images</h2></div><div class="section-button"><button type="submit" aria-controls="section-tnails" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<li><img src="//medlineplus.gov/ency/images/ency/tnails/1122t.jpg" alt="Female urinary tract" title="Female urinary tract" class="side-img"/><a href="../imagepages/1122.htm">Female urinary tract</a></li>
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<li><img src="//medlineplus.gov/ency/images/ency/tnails/1123t.jpg" alt="Male urinary tract" title="Male urinary tract" class="side-img"/><a href="../imagepages/1123.htm">Male urinary tract</a></li>
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</ul></div></div></section><section><div class="section"><div class="section-header"><div class="section-title"><h2>References</h2></div><div class="section-button"><button type="submit" aria-controls="section-Ref" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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</div></div><div class="section-body" id="section-Ref"><p>Judd E, Sanders PW, Agarwal A. Diagnosis and clinical evaluation of acute kidney injury. In: Johnson RJ, Floege J, Tonelli M, eds. <em>Comprehensive Clinical Nephrology.</em> 7th ed. Philadelphia, PA: Elsevier; 2024:chap 72.</p><p>Riley RS, McPherson RA. Basic examination of the urine. In: McPherson RA, Pincus MR, eds. <em>Henry's Clinical Diagnosis and Management by Laboratory Methods.</em> 24th ed. Philadelphia, PA: Elsevier; 2022:chap 29.</p></div></div></section>
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<section><div class="section"><div class="section-header"><div class="section-title"><h2>Review Date 8/20/2023</h2></div><div class="section-button"><button type="submit" aria-controls="section-version" role="button" title="Expand/Collapse section"><span class="icon icon-section-action">
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<div id="section-version" class="section-body"><p>Updated by: Jacob Berman, MD, MPH, Clinical Assistant Professor of Medicine, Division of General Internal Medicine, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. </p>
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