Charcot-Marie-Tooth Disease, Type 4d, also known as charcot-marie-tooth disease type 4d, is related to hereditary sensory neuropathy and hereditary neuropathies. An important gene associated with Charcot-Marie-Tooth Disease, Type 4d is NDRG1 (N-Myc Downstream Regulated 1), and among its related pathways/superpathways are Glycerophospholipid biosynthesis and PI Metabolism. Affiliated tissues include tongue and bone, and related phenotypes are decreased motor nerve conduction velocity and distal lower limb muscle weakness