Dopamine transporter imaging study in parkinsonism occurring in fragile X premutation carriers

Abstract
The authors studied four patients with parkinsonism carrying the fragile X premutation using SPECT with [23I]FP-CIT. They found evidence of preserved presynaptic nigrostriatal function, suggesting that parkinsonism in the X fragile premutation might be related to postsynaptic dopaminergic changes or different neurotransmitter alterations.