Myasthenia gravis belongs to which department?

Written by Zhang Hui
Neurology
Updated on September 21, 2024
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Myasthenia gravis is an autoimmune disease of the nervous system, primarily affecting the neuromuscular junction where synaptic function is significantly impaired. This disease falls under the purview of neurology, and most neurologists are quite familiar with myasthenia gravis, considering it a common and frequently occurring neurological condition. Patients with myasthenia gravis typically exhibit symptoms such as drooping eyelids, double vision, and general fatigue. They experience a pathological tiredness, feeling extremely exhausted after minor activities, although rest can alleviate symptoms. These symptoms are also commonly associated with the nervous system, so it is appropriate to consult the neurology department. Treatment for patients with myasthenia gravis may involve administering immunoglobulins or corticosteroids, depending on the situation, while also taking precautions to prevent potential complications.

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Written by Zhang Hui
Neurology
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What is myasthenia gravis?

Myasthenia gravis is a group of neuromuscular junction disorders and is also an autoimmune disease of the nervous system. It primarily involves the production of certain antibodies in the body that attack the acetylcholine receptors on the postsynaptic membrane of the neuromuscular junction. This results in the inability of nerve impulses to be effectively transmitted to the muscles, causing the muscles to lose neural control, leading to weakness of the limbs. This weakness is typically more pronounced in the evening than in the morning, with symptoms being lighter upon waking and worsening in the afternoon. As the disease is caused by an autoimmune response, a major focus of treatment is to suppress this abnormal immune reaction, primarily through the administration of corticosteroids. Additionally, many patients with myasthenia gravis also exhibit thymus abnormalities, necessitating thorough CT examinations of the thymus.

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Written by Zhang Hui
Neurology
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Early symptoms of myasthenia gravis

Myasthenia gravis is a disease of the neuromuscular junction and also an autoimmune disease, caused by a dysfunction in the patient's immune system. Early symptoms of myasthenia gravis may include mild general fatigue, which can be relieved by rest, and may not be particularly concerning to the individual. Some patients may initially exhibit slight ptosis and occasional double vision as clinical symptoms, which they might not take very seriously either. As the disease progresses, the symptoms become more severe, such as noticeable ptosis, double vision, slurred speech, difficulty swallowing, and even potential weakness of the respiratory muscles, leading to respiratory failure.

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Written by Zhang Hui
Neurology
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Myasthenia gravis should not use what medicine?

Myasthenia gravis is a neuromuscular junction disease in neurology, primarily due to some synaptic dysfunction, leading to pathological fatigue and general weakness in patients. Patients with myasthenia gravis often experience exacerbation of the disease due to fatigue or infection, and certain medications can severely affect synaptic function, worsening the condition, and are therefore not to be used. The medications to avoid mainly include the following types: The first type is aminoglycoside antibiotics, which can exacerbate the transmission at the neuromuscular junction. Second, quinolone antibiotics should also be avoided as much as possible. Third, some antiarrhythmic drugs can also decrease the excitability of the fascia and are not recommended. Additionally, some drugs like morphine, benzodiazepines, and receptor blockers should also be contraindicated or used with caution.

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Written by Zhang Hui
Neurology
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Can myasthenia gravis be cured completely?

Myasthenia gravis is a relatively common disease in neurology. Whether it can be completely cured mainly depends on the severity of the disease and some of its subtypes. For instance, patients with ocular myasthenia gravis only exhibit symptoms such as ptosis; by using some corticosteroids or acetylcholinesterase inhibitors, some patients can be cured. However, there are also patients who experience generalized muscle weakness, which is particularly severe and may even affect the respiratory muscles. These patients need long-term or even lifelong medication to prevent the recurrence of severe myasthenia gravis. Additionally, some patients with myasthenia gravis also have thymomas, and many patients can be cured after the removal of the thymoma. Therefore, most cases of myasthenia gravis cannot be completely cured and require long-term medication, though a small portion might be curable.

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myasthenia gravis-related antibodies

Most cases of myasthenia gravis are mediated by acetylcholine receptor antibodies, involving cell-mediated immunity with complement, generally affecting the neuromuscular junction and causing a neuromuscular transmission disorder. This results in an acquired autoimmune disease of muscle weakness. However, a small number of patients with myasthenia gravis are mediated by muscle-specific kinase antibodies or low-density lipoprotein receptor-related protein 4 antibodies. Its main clinical manifestations include skeletal muscle weakness, fatigue, worsening with activity, and significant alleviation or reduction of symptoms after rest and the use of acetylcholinesterase inhibitors. Additionally, the disease can occur at any age, with females being more affected than males before the age of 40. Between 40 and 50 years old, the incidence rates between males and females are comparable, but after 50 years of age, the incidence rate in males is higher than in females.