Hi, Myasthenia gravis is a long term neuromuscular disease that leads to varying degrees of skeletal muscle weakness. It is an autoimmune disease which results from antibodies that block nicotinic acetylcholine receptors at the junction between the nerve and muscle. This prevents nerve impulses from triggering muscle contractions. Rarely an inherited genetic defect in the neuromuscular junction results in a similar condition known as congenital myasthenia. Babies of mothers with myasthenia may have symptoms during their first few months of life, known as neonatal myasthenia. Diagnosis can be supported by blood tests for specific antibodies, the edrophonium test, or nerve conduction studies. Early diagnosis and treatment is the best way to protect your self from it. Don t worry nowadays investigations are more precise and accurate than before so ask your physician for some tumor investigations. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ahmed Aly Hassan