ZNF804A is one of many genes coding for transcription factors, splicing regulators and chromatin remodeling proteins that have been implicated in SZ, BD, and ASD, including POU3F2, A2BP1, MYT1L, JARID2, TCF4, ARNT2, CHD8, SMARCA2, and β-catenin (which is regulated by the lithium and DISC1 target GSK3β) [9–24]. The gene discussed is ARNT2; the disease is Behcet disease.