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Wilson disease in children
1Departments of Paediatrics, Medicine and Pharmacology and Toxicology, University of Toronto, Toronto, Canada.
Insights
Wilson disease (WD) is an inherited copper metabolism disorder. Early diagnosis and lifelong treatment, including chelation or zinc, are crucial for near-normal longevity in children.
Area of Science:
- Genetics and Molecular Biology
- Hepatology
- Pediatric Medicine
Background:
- Wilson disease (WD) is an inherited disorder of copper metabolism caused by ATP7B gene mutations.
- It primarily affects copper disposition in the liver, leading to diverse clinical presentations in children and adults.
- Hepatic disease is common in pediatric patients, but neurological, psychiatric, and hematological symptoms can also occur.
Purpose of the Study:
- To summarize the clinical diversity and diagnostic approaches for Wilson disease in pediatric patients.
- To emphasize the importance of early diagnosis and effective management for long-term patient outcomes.
- To highlight recent findings on WD-mimic disorders and their implications for understanding WD pathogenesis.
Main Methods:
- Review of clinical presentations, diagnostic biochemical tests (liver function, ceruloplasmin, urinary copper), and genetic testing.
- Discussion of management strategies, including oral chelation therapy and zinc for presymptomatic cases.
- Differentiation of Wilsonian fulminant hepatic failure from decompensated cirrhosis in pediatric patients.
Main Results:
- Wilson disease presents with varied symptoms, with liver disease being common in children.
- Early diagnosis, ideally in asymptomatic individuals, significantly improves prognosis and longevity.
- Accurate diagnosis relies on clinical suspicion, biochemical markers, and genetic analysis.
Conclusions:
- Timely diagnosis and consistent adherence to lifelong treatment are essential for managing Wilson disease in children.
- Zinc is a potential therapeutic option for presymptomatic pediatric Wilson disease.
- Distinguishing WD-related hepatic failure from other causes is critical for appropriate treatment, including liver transplantation decisions.
Abstract:
Wilson disease (WD) is an inherited disorder mainly of hepatocellular copper disposition, due to dysfunction of the Wilson ATPase, a P1B-ATPase encoded by the gene ATP7B. In children, as in older age brackets, clinical disease is highly diverse. Although hepatic disease is the common presentation in children/adolescents, neurologic, psychiatric, and hematologic clinical presentations do occur. Very young children may have clinically evident liver disease due to WD. Early diagnosis, preferably when the child/adolescent is asymptomatic, is most likely to result in near-normal longevity with generally good health so long as the patient tolerates effective medication, is adherent to the lifelong treatment regimen, and has consistent access to the medication. Apart from a lively index of clinical suspicion on the part of physicians, biochemical tests including liver tests, serum ceruloplasmin, and basal 24-hour urinary copper excretion and genotype determination are key to diagnosis. Oral chelation treatment remains central to medical management, although zinc appears to be an attractive option for the presymptomatic child. Pediatric patients presenting with Wilsonian fulminant hepatic failure must be differentiated from those with decompensated cirrhosis, since the latter may respond to intensive medical interventions and not require liver transplantation. Recently identified WD-mimic disorders reveal important aspects of WD pathogenesis.