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2524 Pontocerebellar hypoplasia type 2

definition

Pontocerebellar hypoplasia type 2 (PCH2) is the most common subtype of pontocerebellar hypoplasia (see this term) characterized by neonatal onset and a lack of voluntary motor development and later progressive microencephaly, generalized clonus, development of chorea and spasticity. The majority of patients will not reach puberty.