HLA class II allele analysis in MuSK-positive myasthenia gravis suggests a role for DQ5.

We evaluated HLA-DRB1*, DQA1*, and DQB1* allele profile in MuSK-MG in comparison with a control population and non-thymoma early onset AChR-MG (AChR-EOMG). We confirm the strong positive association of AChR-EOMG with DRB1*03 DQA1*0501 and DQB1*0201 alleles as previously reported. MuSK-MG appears to be strongly associated with DRB1*16 and DQB1*0502 alleles