MUSK and myasthenia gravis: Myasthenia gravis (MG) is an autoimmune neuromuscular disease driven primarily by acetylcholine receptor autoantibodies, muscle-specific tyrosine kinase (MuSK) autoantibodies, and low-density lipoprotein receptor-associated protein 4 autoantibodies, which result in damage to the postsynaptic membrane at the neuromuscular junction (Pevzner et al., 2012).