megalencephalic leukoencephalopathy with subcortical cysts 1
Definition
A megalencephalic leukoencephalopathy with subcortical cysts characterized by early-onset macrocephaly and delayed-onset neurologic deterioration, including cerebellar ataxia, spasticity, epilepsy, and mild cognitive decline, that has_material_basis_in homozygous or compound heterozygous mutation in the MLC1 gene on chromosome 22q13.