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A rare genetic peripheral sensorimotor neuropathy with an X-linked recessive inheritance pattern and the infancy to childhood-onset of progressive distal muscle weakness and atrophy (first appearing and more prominent in the lower extremities than the upper) which usually manifests with foot drop and gait disturbance, bilateral profound prelingual sensorineural hearing loss and progressive optic neuropathy. Females are asymptomatic and do not display the phenotype.
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