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April 15, 2025
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A Myasthenia Gravis blood test looks for antibodies that attack the communication between your nerves and your muscles. The presence of these antibodies in your blood can help detect the early onset of the autoimmune disorder, Myasthenia Gravis.
Myasthenia Gravis is a long-term neuromuscular disorder that causes weakness in your skeletal muscles. It commonly affects the muscles that control eye movements, facial expressions, swallowing, and breathing.
This disorder happens when your immune system makes antibodies that stop or damage the acetylcholine receptors (which help muscles work) on your muscle cells. Thymus gland abnormalities can also contribute to the production of the antibodies that attack the acetylcholine receptors.
A Myasthenia Gravis test screens your blood for specific antibodies that can block nerve signals to your muscles. These include AChR (acetylcholine receptor) and MuSK (muscle-specific kinase) antibodies. If you have high levels of these two types of antibodies, it could mean that you have Myasthenia Gravis. Another marker used to diagnose Myasthenia Gravis, although less common than the above two, is Anti-LRP4 Antibodies.
If you have recently started dealing with things like drooping eyelids, double vision, difficulty swallowing or speaking, weakness in the arms, legs, or diaphragm, difficulty breathing or fatigue after physical exertion, getting yourself tested for MG is highly recommended.
Your results will typically be made available within a few days to a week after testing
A positive test result usually indicates the presence of the antibodies associated with Myasthenia Gravis. This suggests a high likelihood that you may have the condition. Your doctor will advise you on the steps going forward
A negative result does not completely rule out Myasthenia Gravis. Some patients with the condition may not have detectable levels of the antibodies. This is especially true in the early stages or in those with MuSK antibody-negative disease.
Use our online booking engine or book your test by giving us a call.
On the online booking engine select the “appointment type” you need.
You will be seen by one of our friendly phlebotomists or trained clinicians.
Fasting is typically not required for a MG blood test. However, be sure to inform your doctor about any medications or supplements you are currently taking
The procedure is fairly quick and typically takes less than 15 minutes to complete. It is also a fairly painless procedure and you can usually return to their daily activities afterwards
Your results will be available within a few days. Your doctor will discuss everything you need to know about results and health status. If you test positive for the antibodies in question, additional testing may be recommended
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We offer a wide range of private blood tests in London. Same-day appointments are available 5 days a week.
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