In ASD, elevation [103,104,105,106], no differences [107,108,109,110] in S100B levels were reported, and parallel results were found in ADHD studies (no differences [113,114,115] or higher [116,117] S100B levels in patient groups), though in ADHD, three out of five publications were performed on the same group, analyzing different clinical aspects [113,114,115]. This evidence concerns the gene S100B and attention deficit-hyperactivity disorder.