Antisynthetase syndrome (AS) is strongly associated with the presence of antibodies to aminoacyl-transfer RNA (tRNA) synthetases (ARSs) that are implicated in the pathogenesis of myositis and interstitial lung disease (ILD). Antibodies against eight antisynthetases have been identified and are detected in 16–26% of patients with idiopathic inflammatory myopathies (IIM).1 Serum assays for five of these…
