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An axonal peripheral sensorimotor polyneuropathy associated with pyramidal involvement. So far, it has been described in 13 members of a large Tunisian family. Onset occurred during the first decade of life with progressive distal atrophy involving both the upper and lower limbs, associated with a mild pyramidal syndrome (brisk patellar and upper limb reflexes, absent ankle reflexes and unattainable plantar reflexes). Transmitted in an autosomal recessive manner and the disease-causing locus has been mapped to 8q13-21.1.
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