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A rare genetic axonal hereditary motor and sensory neuropathy disorder with characteristics of adulthood-onset of slowly progressive, occasionally asymmetrical, distal muscle weakness and atrophy (predominantly in the lower limbs), pan-modal sensory loss, muscle cramping in extremities and/or trunk, pes cavus and absent or reduced deep tendon reflexes. Gait anomalies and variable autonomic disturbances, such as erectile dysfunction and urinary urgency, may be associated. The disease can be caused by homozygous or heterozygous mutation in the LRSAM1 gene on chromosome 9q33.
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