A rare genetic motor neuron disease with characteristics of adult-onset of slowly progressive proximal muscular weakness with fasciculations, amyotrophy, cramps and absent/hypoactive reflexes without bulbar or pyramidal involvement. Caused by heterozygous mutation in the gene encoding vesicle-associated membrane protein-associated protein B (VAPB) on chromosome 20q13.
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3764266015
Autosomal dominant late-onset spinal muscular atrophy Finkel type