| Phenotype details |
normal birth and early milestones; onset childhood, cerebellar ataxia, cognitive decline; pyramidal syndrome (increased tone, brisk reflexes, upgoing plantars); cerebellar syndrome (upper and lower limb ataxia, dysarthria, nystagmus); Parkinsonism rigidity, bradykinesia.; dystonia generalized; seizures, ophthalmoplegia, PEG inserted in advance stage; severe cognitive decline; MRI brain basal ganglia, thalamus, cerebellum, deep gray matter |