In Brazil, a study42conducted a genetic evaluation of thetransthyretin(TTR) gene in 119 patients diagnosed with CIDP and identified pathogenic variants in 5 individuals: 3 with the pVal30Met mutation, 1 with the p.Val71Ala mutation, and 1 with the p.Asp38Tyr mutation. The gene discussed is TTR; the disease is chronic inflammatory demyelinating polyradiculoneuropathy.