CSF biomarkers (lactate, cell count, % lymphocytes, % monocytes, total protein content, albumin, IgG, IgM, IgA, CSF/serum albumin ratio, CSF/serum IgG ratio, CSF/serum IgA ratio, intrathecal IgG synthesis, blood–brain barrier dysfunction, specific antibody synthesis for measles, rubella, HSV, VZV, EBV, and CBV) did not differ between possible or definitive pAE compared to AD patients (Table 1). The gene discussed is CD40LG; the disease is Alzheimer disease.