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Scoring system is 93 percent accurate for diagnosing Wilson's disease in pediatric patients
Date:11/30/2010

An Italian research team confirmed that the scoring system for Wilson's disease (WD) provides good diagnostic accuracy with 93% positive and 92% negative predictive values, respectively in children with mild liver disease. In asymptomatic children, a urinary copper excretion above 40 μg/24 hours was suggestive of WD, however the penicillamine challenge test (PCT) did not provide an accurate diagnosis in this patient subset. Results of the study appear in the December issue of Hepatology, a journal published by Wiley-Blackwell on behalf of the American Association for the Study of Liver Diseases (AASLD).

WD is a rare genetic disorder where excessive amounts of copper accumulate in the liver, kidneys, brain, and eyes (cornea). Patients may experience a brown ring (Kayser-Fleischer ring) around the cornea of the eye, various liver diseases, slurred speech, and tremors, with symptoms appearing between the ages of 5 to 35. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) approximately one in 40,000 individuals develop WD, which affects men and women equally.

A prompt diagnosis of WD is vital to avoid rapid progression of liver and neurological damage. "Unfortunately, diagnosis of WD is a challenging task, especially in childhood, because conventional criteria established for adults are not always appropriate for children," explained Raffaele Iorio, M.D., of the University Federico II in Italy and lead author of the study.

In order to evaluate the current standard diagnostic criteria and WD scoring system, the research team collected data on 40 children with WD and 58 children with liver disease other than WD, ranging in age from 1 to 21 years of age. Both groups were symptom-free with the predominant sign of liver disease being elevated aminotransferases (higher levels of enzymes from liver cells that when released into the blood, signify liver disease). Molecular analysis and liver
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Contact: Dawn Peters
healthnews@wiley.com
781-388-8408
Wiley-Blackwell
Source:Eurekalert

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