Non-syndromic pontocerebellar hypoplasia (Orphanet_98523) can be described as follows. Nonsyndromic pontocerebellar hypoplasias (PCH) are a rare heterogeneous group of diseases characterized by hypoplasia and atrophy and/or early neurodegeneration of the cerebellum and pons. Eight subtypes named type 1-8 have been described (see these terms), generally inherited in an autosomal recessive pattern. Also known as: PCH, Pontoneocerebellar atrophy, Pontoneocerebllar hypoplasia.