Autosomal dominant slowed nerve conduction velocity

Autosomal dominant slowed nerve conduction velocity is a rare inherited peripheral neuropathy classified within the spectrum of Charcot-Marie-Tooth disease type 1 (CMT1) and related demyelinating neuropathies. It is characterized by uniformly reduced motor nerve conduction velocities (typically below 38 m/s in the median nerve), indicating impaired myelin function in peripheral nerves. This condition is mapped under the broader category of hereditary motor and sensory neuropathies (HMSN) and is classified with ICD-10 code G60.0 (hereditary motor and sensory neuropathy). The disease primarily affects the peripheral nervous system, leading to progressive weakness and atrophy of distal muscles, particularly in the lower legs and feet, as well as the hands. Patients may experience sensory loss, reduced or absent deep tendon reflexes, foot deformities such as pes cavus (high-arched feet) and hammer toes, and difficulty with fine motor tasks. Onset is typically in childhood or adolescence, though severity and progression can vary considerably even within the same family. Some individuals may remain mildly affected, while others develop significant disability over time. There is currently no cure for autosomal dominant slowed nerve conduction velocity. Management is supportive and multidisciplinary, including physical therapy to maintain muscle strength and flexibility, occupational therapy for hand function, orthotic devices (such as ankle-foot orthoses) to improve gait, and surgical intervention for severe skeletal deformities when necessary. Pain management may be needed for neuropathic symptoms. Genetic counseling is recommended for affected families, as each child of an affected individual has a 50% chance of inheriting the condition.

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