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Megalencephalic leukoencephalopathy with subcortical cysts.
Bhim S Singhal1, J Rafael Gorospe, Sakkubai Naidu
1Department of Neurology, Bombay Hospital Institute of Medical Sciences, Medical Research Center, Mumbai, India. bssingl@vsnl.com
Journal of Child Neurology
|October 24, 2003
Summary
Megalencephalic leukoencephalopathy with subcortical cysts (MLC) is a white matter disorder diagnosed using MRI. Genetic analysis reveals MLC1 gene mutations are the cause, with a founder effect noted in India's Agarwal community.
Area of Science:
- Neurology
- Genetics
- Radiology
Background:
- Megalencephalic leukoencephalopathy with subcortical cysts (MLC) is a rare white matter disorder.
- Advances in neuroimaging have improved recognition of this condition.
- Key features include megalencephaly, motor disability, and specific MRI findings.
Purpose of the Study:
- To describe the clinical and imaging characteristics of MLC.
- To differentiate MLC from other infantile megalencephalic disorders.
- To identify the genetic basis and population-specific mutations of MLC.
Main Methods:
- Clinical assessment of patients with megalencephaly.
- Magnetic Resonance Imaging (MRI) for white matter evaluation.
- Genetic analysis to identify mutations in the MLC1 gene.
Main Results:
- MLC presents with infantile megalencephaly, spasticity, ataxia, seizures, and cognitive decline.
- MRI reveals extensive bilateral white matter changes and temporal cysts.
- Mutations in the MLC1 gene cause MLC; a common mutation suggests a founder effect in the Agarwal community in India.
Conclusions:
- MLC can be distinguished from other infantile megalencephalic conditions based on clinical and MRI data.
- MLC is an autosomal recessive disorder linked to MLC1 gene mutations.
- The study highlights a founder effect of a specific MLC1 mutation in the Agarwal population.