CAMTA1 and autosomal dominant cerebellar ataxia: CAMTA1 is known to cause autosomal dominant cerebellar ataxia (non-progressive) with mild intellectual disability (MIM# 614756), with phenotypes including delayed psychomotor development, cerebellar ataxia, intellectual disability, neonatal hypotonia, and variable dysmorphic features, some of them consistent with the phenotype in Case 3.