202 adults w/ idiopathic inflammatory myositis (IIM) studied. Multiple myositis-specific Abs seen in 22% (2/3 w/ tRNA synthetase Abs (ARS+) & half MDA5+). Multiple MSA pts had better survival (HR 0.11), less RP-ILD, fever, rash; more muscle & dysphagia https://t.co/6PCMZJkuNn https://t.co/ElkJzPODaU