MuSK Antibody Skin Test

MuSK refers to muscle-specific receptor tyrosine kinase, a neurotransmitter required for the formation and maintenance of the synapses in the brain that control muscle contraction.

This test looks for the MuSK antibody, which is found in the 30 to 40 percent of patients with myasthenia gravis who do not test positive for the acetylcholine receptor antibody test.