Abstract
Expert opinion suggests the presence ANA and thyroid antibodies may be helpful to diagnosis autoimmune encephalitis (AE). This study investigates the sensitivity of these serum markers in a cohort of 26 patients with AE. TPO-Ab, TG-Ab and ANA (titer ≥1:320) were present in 45%, 35% and 32% of patients tested, respectively. The prevalence of TPO-Ab (11.3%), TG-Ab (10.4%) and ANA ≥1:320 (3.3%) has been previously reported in disease-free populations. Although these antibodies represent non-specific markers of autoimmunity, this study demonstrated that TPO-Ab, TG-Ab and ANA were significantly elevated in AE compared to disease-free populations (p < .001, p = .003, p < .001, respectively).
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