Myasthenia gravis is an autoimmune disease, with many patients also having a thymoma. The thymus is a very important immune organ in humans, and abnormal proliferation of the thymus can produce acetylcholine receptor antibodies. These antibodies circulate to the neuromuscular junction and participate in the antigen-antibody reaction, leading to the onset of myasthenia gravis. By removing the thymus, the initiating antigens of the patient's autoimmune response can be eliminated, reducing the involvement of T cells, B cells, and cytokines in the autoimmune response. This surgery is suitable for patients with thymic hyperplasia and high acetylcholine receptor antibody titers, or those with various types of myasthenia gravis with thymoma, as well as young women with generalized myasthenia gravis, and those who are dissatisfied with cholinesterase inhibitor treatment. About 70% of patients can experience symptom relief or complete recovery after surgery.