PMP22 and Charcot-Marie-Tooth disease: Considering the clinical manifestations in the child, including hand and foot tremors, external foot rotation, a staggering gait, inability to squat, and distal limb muscle strength rated at 5-, alongside the electromyography and genetic findings, a diagnosis of Charcot–Marie–Tooth disease (CMT) was established, specifically aligning with the CMT1A subtype.