CSF or serum autoimmune encephalitis antibodies were negative: Hu, Yo, Ri, Amphiphysin, Ma2/Ta, CV2/CRMP5, MBP, NMDA, AMPA1, AMPA2, GABAB,CASPR2, LGI1, GAD65. The gene discussed is DPYSL5; the disease is autoimmune encephalitis.