Which myopathies are characterized by predominant distal weakness?
• Late adult-onset distal myopathy type 1 (Welander) and type 2 (Markesbery)
• Early adult-onset distal myopathy type 1 (Nonaka), type 2 (Miyoshi), and type 3 (Laing)
• Late adult-onset distal dystrophinopathy
• Myofibrillary myopathy
• Childhood-onset distal myopathy Dayalu P, Teener JW: Stiff person syndrome and other anti-GAD-associated neurologic disorders. Semin Neurol 32:544–549, 2012. Guglieri M, Straub V, Bushby K et al.: Limb-girdle muscular dystrophies. Curr Opin Neurol 21:576–584, 2008.
• Myotonic dystrophy
• Fascioscapulohumeral dystrophy
• Scapuloperoneal myopathy
• Oculopharyngeal dystrophy
• Emery–Dreifuss humeroperoneal dystrophy
• Inflammatory myopathies: inclusion body myositis
• Metabolic myopathy: Debrancher deficiency, acid-maltase deficiency
• Congenital myopathy: nemaline myopathy, central core myopathy, centronuclear myopathy
