Myasthenia gravis (MG) with antibodies against muscle-specific kinase (MuSK-MG) is an autoimmune disease that impairs neuromuscular transmission leading to widespread weakness and fatigability of skeletal muscles.1,2 Efficient neuromuscular transmission depends on the high-density clustering of acetylcholine receptors (AChRs) on the postsynaptic membrane at the neuromuscular junction (NMJ). Here, MUSK is linked to myasthenia gravis.