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BMD Becker muscular dystrophy CK creatine kinase DM1 myotonic dystrophy type 1 DM2 myotonic dystrophy type 2 EI echointensity ENMC European Neuromuscular Centre FCU flexor carpi ulnaris FDP flexor digitorum profundus FSHD facioscapulohumeral muscular dystrophy IBM inclusion body myositis LDM Laing distal myopathy MG medial gastrocnemius OHSU Oregon Health & Science University 1 Introduction Inclusion body myositis (IBM) is the most common acquired myopathy in patients over 50 years of age [1].

1 Introduction Generalized myasthenia gravis (MG) is an autoimmune disease in which antibodies against the neuromuscular junction—most commonly the nicotinic acetylcholine receptor (AChR)—trigger complement-mediated damage and worsening muscle weakness and fatigue [1]. Up until 2017, mild forms of MG were treated with acetylcholinesterase inhibitors.