GDAP1 and Charcot-Marie-Tooth disease type 4A: On the basis of a positive familiar history, an axonal sensomotoric neuropathy found in affected patients, early age of onset, and an autosomal recessive pattern of inheritance, alteration of GDAP1 gene was screened in the family. GDAP1 gene sequencing showed a homozygous p.G224Hfs∗37 variant, which led us to the confirmation of Charcot-Marie-Tooth disease, type 4A.