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An In Vitro Model for the Study of Cellular Pathophysiology in Globoid Cell Leukodystrophy
Published on: October 21, 2014
Leukodystrophy with multiple beaded periventricular cysts: unusual cranial MRI results in Canavan disease
Anne Drenckhahn1, Markus Schuelke, Ellen Knierim
1Department of Neuropediatrics and the NeuroCure Clinical Research Center, Charité-Universitätsmedizin Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.
Abstract:
A 3-year-old boy was admitted with psychomotor delay, spasticity, progressive visual loss, nystagmus, macrocephaly, and epileptic seizures for diagnostics. Cranial magnetic resonance imaging (MRI) revealed leukodystrophy and multicystic changes. Urine excretion of N-acetylaspartic acid was grossly increased, suggesting Canavan disease. Mutation screening of the ASPA gene confirmed this diagnosis. The underlying enzymatic defect causes accumulation of N-acetylaspartic acid and subsequent progressive myelin degeneration with characteristic spongy degeneration of the subcortical white matter, normally only seen histologically. We describe this case to show that spongy degeneration in Canavan disease may also be present macroscopically in the form of multiple beaded periventricular cysts on cranial MRI.
Insights
Canavan disease, a genetic disorder, causes myelin degeneration. This case highlights macroscopic spongy degeneration, appearing as periventricular cysts on MRI, aiding diagnosis.
Area of Science:
- Neuroscience
- Genetics
- Pediatric Neurology
Background:
- Canavan disease is a rare genetic leukodystrophy.
- It results from a deficiency in the ASPA gene, leading to N-acetylaspartic acid accumulation.
- This accumulation causes progressive demyelination and neurological deficits.
Observation:
- A 3-year-old boy presented with psychomotor delay, spasticity, visual loss, seizures, and macrocephaly.
- Cranial MRI revealed leukodystrophy with multicystic changes.
- Elevated N-acetylaspartic acid in urine suggested Canavan disease.
Findings:
- ASPA gene mutation analysis confirmed the diagnosis of Canavan disease.
- The study observed macroscopic spongy degeneration in the form of multiple beaded periventricular cysts on MRI.
- This finding is typically seen only histologically, offering a novel diagnostic marker.
Implications:
- This case expands the understanding of Canavan disease's radiological presentation.
- Macroscopic periventricular cysts on MRI can be an indicator of spongy degeneration in Canavan disease.
- Early and accurate diagnosis through advanced imaging and genetic testing is crucial for managing pediatric leukodystrophies.
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