Peripheral Demyelinating Neuropathy, Central Dysmyelination, Waardenburg Syndrome, and Hirschsprung Disease

Rare syndrome with the association of the features of Waardenburg Shah and neurological features namely neonatal hypotonia, intellectual deficit (of variable severity), nystagmus, progressive spasticity, ataxia and epilepsy. Autonomic dysfunction (reduced saliva production, sweating and tearing, and bradycardia and arrhythmia) may also be present. Delayed white matter myelination is present on brain MRI, and may also be responsible for neuropathy at the peripheral level. Hirschsprung disease is sometimes absent. Most of the cases are caused by mutations involving the SOX10 gene (22q13.1): either a large deletion or point mutation located in the last two exons.