Disease with characteristics of delayed motor development, hypotonia and progressive neurodegeneration. To date, it has been described in four boys. The syndrome is caused by mutations affecting the two alleles of the HIBCH gene, encoding 3-hydroxyisobutyryl-CoA hydrolase which is caused by homozygous or compound heterozygous mutation in the HIBCH gene on chromosome 2q32. [from
SNOMEDCT_US]