[Separation and establishment of a disease entity--proposal of a disease entity "juvenile type of distal and segmental muscular atrophy of upper extremities"].
D000367:Age Factors; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D009133:Muscular Atrophy / Q000145:classification* / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology; D009460:Neurologic Examination; D011379:Prognosis; D014057:Tomography, X-Ray Computed