Recently, autoantibodies against paranodal proteins, such as neurofascin 155 (NF155) (1, 2), contactin-1 (CNTN1) (3–5), and contactin-associated protein 1 (CASPR1) (6), were reported to be present among subsets of CIDP patients. Here, CNTN1 is linked to chronic inflammatory demyelinating polyradiculoneuropathy.