T1-weighted brain magnetic resonance imaging revealed abnormal, symmetric signals in the cerebellar dentate nucleus (G) as well as white matter degeneration (H). Parkinsonism can occur in patients with CTX (prevalence, ~9%).[1] The neurological signs are restricted to parkinsonism and misdiagnosed with Parkinson's disease in some patients. Furthermore, brain susceptibility-weighted imaging and quantitative susceptibility mapping revealed bilateral iron deposition, which suggests postsynaptic disruption of the striatal dopaminergic loop as causal to his parkinsonism. [Extracted from the article]