Other autoimmune encephalitis (AE)-related antibodies against GFAP and paraneoplastic neurological syndrome (PNS)-related antibodies, including anti-Hu, anti-Ri, anti-Yo, anti-Ma2, anti-CV2, and anti-amphiphysin, were absent from the CSF and serum, respectively. Here, GFAP is linked to paraneoplastic neurologic syndrome.