What is pathophysiology of myasthenia gravis?
Myasthenia gravis is an autoimmune disease of the neuromuscular junction (NMJ) caused by antibodies that attack components of the postsynaptic membrane, impair neuromuscular transmission, and lead to weakness and fatigue of skeletal muscle.
What are the cardinal features of myasthenia gravis?
Myasthenia gravis (my-us-THEE-nee-uh GRAY-vis) is characterized by weakness and rapid fatigue of any of the muscles under your voluntary control. It’s caused by a breakdown in the normal communication between nerves and muscles.
Which factors precipitate myasthenia gravis MG?
Myasthenia gravis, similar to other autoimmune disorders, occurs in genetically susceptible individuals. Precipitating factors include conditions like infections, immunization, surgeries, and drugs.
What are the differential diagnosis of myasthenia gravis?
Differential diagnosis includes congenital myasthenic syndromes, Lambert Eaton syndrome, botulism, organophosphate intoxication, mitochondrial disorders involving progressive external ophthalmoplegia, acute inflammatory demyelinating polyradiculoneuropathy (AIDP), motor neuron disease, and brainstem ischemia.
Does myasthenia gravis affect the kidneys?
Such difficulties, common in myasthenia gravis, may hinder hydration, which has been shown to be detrimental for kidney function.
Is myasthenia gravis inherited?
Myasthenia gravis is not inherited and it is not contagious. It generally develops later in life when antibodies in the body attack normal receptors on muscle.
What is the main cause of myasthenia gravis symptoms?
Myasthenia gravis is caused by an error in the transmission of nerve impulses to muscles. It occurs when normal communication between the nerve and muscle is interrupted at the neuromuscular junction—the place where nerve cells connect with the muscles they control.
What is penicillamine induced myasthenia?
Abstract. D-penicillamine, a drug used to treat rheumatoid arthritis, Wilson’s disease, and cystinuria, can cause myasthenia gravis. Fortunately, the myasthenia typically resolves after discontinuation of the drug.
How does myasthenia gravis affect the urinary system?
Bladder problems like urinary incontinence, urgency, and nocturia — waking up frequently to urinate — are common in people with myasthenia gravis (MG), particularly those with late-onset disease, a study found.