In the previous study, the affected individuals with TRAPPC11 mutations presented with two groups of clinical manifestations: one with more prominent muscular and skeletal symptoms and the other with microcephaly, hyperkinetic movements, ataxia, and intellectual disability, apparently reflecting the difference of the two genotypes, Gly980Arg and Ala372_Ser429del. Here, TRAPPC11 is linked to cerebellar ataxia.