Neurologic impairment in Wilson disease

Area of Science:

• Neurology
• Toxicology
• Genetics

Background:

• Wilson disease (WD) neurological symptoms manifest later than hepatic symptoms, often in misdiagnosed or treatment-resistant cases.
• Neurologic WD arises from extrahepatic copper toxicity damaging nervous tissue, increasing copper in brain and CSF.
• Copper toxicity mechanisms include mitochondrial damage, oxidative stress, and blood-brain barrier dysfunction, leading to demyelination.

Purpose of the Study:

• To elucidate the mechanisms and clinical manifestations of neurologic Wilson disease.
• To highlight the impact of copper toxicity on brain structures and function.
• To emphasize the importance of early diagnosis and treatment for preventing neurologic sequelae.

Main Methods:

• Review of neuropathologic findings in Wilson disease.
• Analysis of clinical presentations and common neurologic symptoms.
• Correlation of MRI findings with disease progression and treatment response.

Main Results:

• The putamen is most affected neuropathologically, with other basal ganglia and brainstem less so.
• Common symptoms include movement disorders (tremor, dystonia, parkinsonism, ataxia, chorea), dysphagia, and dysarthria.
• Brain MRI frequently shows abnormalities like T2 hyper/hypointensities in basal ganglia and white matter, and atrophy.

Conclusions:

• Neurologic symptoms in WD are largely reversible with timely anti-copper treatment, though residual impairment can occur.
• Early initiation of anti-copper therapy is crucial for preventing brain damage and neurologic burden.
• Population screening via genetic methods like exome sequencing could facilitate early WD treatment and reduce neurologic impact.