3-2-04. Ultrasonographic evaluation of facial muscles in myathenia gravis

It is known that the differences of clinical features in myasthenia gravis (MG) depends on the types of antibodies, such as anti-acetylcholine receptor (AChR) or anti-muscle-specific receptor tyrosine kinase (MuSK) antibodies. To evaluate facial muscles in patients with MG using ultrasonography (US), we performed US to measure thickness of facial muscles. Fifty patients with MG (39 AchR positive, 7 MuSK positive, and 4 double-senegative), 8 chronic progressive external ophthalmologia (CPEO) and 36 healthy subjects were enrolled prospectively.

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