In fact, observations have shown presentation of Sjögren’s syndrome, rheumatoid arthritis, thrombocytopenia, anti-phospholipid syndrome, and hypothyroidism as comorbid states with SLE [3].Myasthenia gravis (MG) is a chronic, organ-specific autoimmune disease in which elements of the motor end plate are affected by the immune system, specifically by the anti-R-acetylcholine (Ach) autoantibodies and T-lymphocytes directed against Ach receptors, specific tyrosine kinase receptors (MuSK), and muscle proteins [6-8]. The gene discussed is MUSK; the disease is myasthenia gravis.