Other genetic diseases as congenital disorders of glycosylation (type1a), dandy walker syndrome, α-dystroglycan related dystrophies (Walker Warburg, muscle eye brain disease, Fukuyama congenital muscular dystrophies), lissencephaly with cerebellar hypoplasia, CASK gene defect, RELN &VLDLR mutations, X-linked hoyeraal-Hreidrasson syndrome, pediatric-onset of spinocerebellar ataxia could mimic PCH and have to be checked especially in unresolved cases (the ones that don't have a genetic diagnosis and are not categorized under one of of PCH types) [18–26]. The gene discussed is RELN; the disease is cerebellar ataxia.