Charcot-Marie-Tooth Disease, Type 4a, also known as charcot-marie-tooth disease type 4a, is related to charcot-marie-tooth disease, axonal, with vocal cord paresis, autosomal recessive and charcot-marie-tooth disease, axonal, type 2k. An important gene associated with Charcot-Marie-Tooth Disease, Type 4a is GDAP1 (Ganglioside Induced Differentiation Associated Protein 1). Affiliated tissues include peripheral nerve, and related phenotypes are decreased nerve conduction velocity and emg abnormality