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The thymus gland cells form part of the body's immune system. In those with myasthenia gravis, the thymus gland is large and abnormal. It sometimes contains clusters of immune cells that indicate lymphoid hyperplasia, and the thymus gland may give wrong instructions to immune cells. [44]
Thymectomy is a treatment for myasthenia gravis, a neuromuscular disease. [5] For about 60% of people with myasthenia gravis, thymectomy significantly improves their symptoms of muscle weakness. In about 30% of cases, thymectomy results in permanent remission of myasthenia gravis, negating the need for any additional medication.
Thymoma. surgical removal, chemotherapy (in malignant cases). A thymoma is a tumor originating from the epithelial cells of the thymus that is considered a rare neoplasm. [1] Thymomas are frequently associated with neuromuscular disorders such as myasthenia gravis; [2] thymoma is found in 20% of patients with myasthenia gravis. [3]
Myasthenia gravis is an autoimmune disease most often due to antibodies that block acetylcholine receptors, involved in signalling between nerves and muscles. [20] It is often associated with thymic hyperplasia or thymoma, [20] with antibodies produced probably because of T cells that develop abnormally. [21]
Immunology. Thymus hyperplasia refers to an enlargement ("hyperplasia") of the thymus. [1] It is not always a disease state. The size of the thymus usually peaks during adolescence and atrophies in the following decades. Before the immune function of the thymus was well understood, the enlargement was sometimes seen as a cause for alarm, and ...
Myasthenia gravis is caused by autoantibodies to the postsynaptic acetylcholine receptors. Lambert–Eaton myasthenic syndrome (LEMS) is a rare autoimmune disorder characterized by muscle weakness of the limbs. It is also known as myasthenic syndrome, Eaton–Lambert syndrome, and when related to cancer, carcinomatous myopathy.
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