neurodevelopmental disorder with spastic paraplegia and microcephaly
Definition
An amino acid metabolic disorder characterized delayed psychomotor development with delayed walking, moderately to severely impaired intellectual development, and poor or absent speech that has_material_basis_in homozygous or compound heterozygous mutation in the GPT2 gene on chromosome 16q11.2. Postnatal microcephaly and spastic paraplegia are also common.