Of greater relevance to a HLA study, patients with LGI1 or CASPR2 antibodies often had co-existent autoimmune conditions (28% and 23%, respectively), including Hashimoto’s thyroiditis (n = 8), psoriasis (n = 7) and pernicious anaemia (n = 2). This evidence concerns the gene CNTNAP2 and Hashimoto thyroiditis.