FOXP1 and Behcet disease: 2010). While FOXP1 is a high‐confidence ASD risk gene, its association with BD remains tentative, likely due to BD's polygenic nature. Functional studies highlight FOXP1’s role in synaptic plasticity, neuronal migration, and corticogenesis (Araujo 2017; Braccioli et al. 2017). Notably, FOXP1 is highly expressed in the striatum, hippocampus, and neocortex—regions implicated in cognitive and emotional regulation (Ferland et al. 2003). Recurrent FOXP1 mutations identified in ASD cohorts (Iossifov et al. 2014) underscore its importance in neurodevelopmental pathways.