Likewise, serum autoimmune encephalitis panel, encompassing N-methyl-D-aspartate (NMDA), anti-α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor (AMPA), leucine-rich glioma-inactivated 1 antibodies (LGI1), gamma-aminobutyric acid type B receptor subunit 1/2 (GABA-B 1/2), and contactin-associated protein-like 2 (CASPR2) antibodies, were also negative (Table 3). The gene discussed is CNTNAP2; the disease is autoimmune encephalitis.