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| Definition: | A disorder involving injury to the kidney caused by toxic effects of the contents of muscle cells.
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| Causes, incidence, and risk factors: | Myoglobin is an oxygen binding protein pigment found in the skeletal muscle. When the skeletal muscle is damaged, the myoglobin is released into the bloodstream. It is filtered out of the bloodstream by the kidneys. Myoglobin may occlude the structures of the kidney, causing damage such as acute tubular necrosis or kidney failure. Myoglobin breaks down into potentially toxic compounds, which will also cause kidney failure. Necrotic (dead tissue) skeletal muscle may cause massive fluid shifts from the bloodstream into the muscle, reducing the relative fluid volume of the body and leading to shock and reduced blood flow to the kidneys.
The disorder may be caused by any condition that results in damage to skeletal muscle, especially trauma.
Risk factors include:
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Review Date: 11/30/2001
Reviewed By: Andrew Koren, M.D., Department of Nephrology, NYU-Mount Sinai Medical Center, New York, NY. Review provided by VeriMed Healthcare Network.
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