GFAP and Autoimmunity: Previous studies reporting elevated cerebrospinal fluid (CSF) levels of tumor necrosis factor alpha (TNFα), interleukin (IL)27, IL6, CCL20,6 IL1‐beta, and IL177 in patients with GFAP autoimmunity were limited by size and by the inclusion of patients without CSF GFAP‐IgG positivity.2, 3