For instance, a positive DAT scan, which indicates reduced dopaminergic activity, may also be observed in several non-dopaminergic or non-Parkinson’s-related conditions, such as progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), and normal-pressure hydrocephalus (NPH) [35,36]. Here, SLC6A3 is linked to normal pressure hydrocephalus.