A distal form of chronic spinal muscular atrophy.
D000368:Aged; D000690:Amyotrophic Lateral Sclerosis / Q000235:genetics; D002908:Chronic Disease; D004576:Electromyography; D005260:Female; D005542:Forearm; D005799:Genes, Dominant; D006227:Hand Deformities, Acquired / Q000235:genetics*; D006801:Humans; D008297:Male; D009133:Muscular Atrophy / Q000235:genetics* / Q000473:pathology; D013118:Spinal Cord Diseases / Q000235:genetics* / Q000473:pathology