To aid in the elucidation of the common immune mechanisms of CIDP and MN, we performed an in-depth investigation of autoantibody levels for the comparative analysis of clinical characteristics among patients suffering from CIDP with MN and anti-CNTN1 antibody-associated AN, with different chronological orders of CIDP and MN onset. The gene discussed is CNTN1; the disease is chronic inflammatory demyelinating polyradiculoneuropathy.