Chronic inflammatory demyelinating polyneuropathy (CIDP) is an autoimmune disorder of the peripheral nervous system, whose pathological hallmarks include endoneurial infiltration of inflammatory cells led by macrophages, the involvement of CD4+ and CD8+ T-cells, and the formation of “onion bulbs” indicative of recurrent demyelination and remyelination [1]. This evidence concerns the gene CD8A and chronic inflammatory demyelinating polyradiculoneuropathy.