DPYSL5 and autoimmune encephalitis: Serum and cerebrospinal fluid (CSF) autoimmune encephalitis-associated antibody testing (NMDA-R-Ab, CASPR2-Ab, AMPA1-Ab, AMPA2-Ab, LGI1-Ab, GABAB-R-Ab, GAD65-Ab) and paraneoplastic syndromes (CV2/CRMP5, Ma2/Ta, Ri, Yo, Hu, Amphiphysin) were sent to the Peking Union Medical College Hospital.