In the FTD group, Spearman’s rank correlation coefficient, controlling for age and sex, revealed a negative association between dopamine transporter binding in the striatum (rs = −0.366, P = 0.043, Fig. 3) and the putamen (rs = −0.416, P = 0.02), and Parkinsonian features as measured by MDS-UPDRS. Here, SLC6A3 is linked to frontotemporal dementia.