CNTN2 and viral encephalitis: While examining for anti-NMDAR encephalitis, one should also consider other encephalitides including AMPA-R, metabotropic glutamate receptor, voltage-gated potassium channels (LGI1, CASPR2, or contactin-2), anti-Hu, anti-CV2, anti-CRM, anti-P5, anti-MA proteins, voltage-gated calcium channel defects, GABAB-R, glycine-R, and GABAA-R defects (53, 70, 71).