In a long-term follow-up by Simmons et al. [12] in which 90 % of the CIDP-I and 80 % of the CIDP-MGUS patients were treated, CIDP-MGUS had more functional impairment at the end of the follow-up period, but we do not find a similar outcome in this study. Here, PMP22 is linked to chronic inflammatory demyelinating polyradiculoneuropathy.