NAA10 and acquired idiopathic inflammatory myopathy: Approximately 60–65% of IIM patients have detectable serum autoantibodies, namely myositis-specific autoantibodies (MSA), which are unique to IIM and usually mutually exclusive to one another, or myositis-associated autoantibodies (MAA) which can occur in other connective tissue diseases (CTD) or be present along with MSA [2].