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Tips for Diagnosing Metabolic Myopathies
When evaluating patients with possible myopathic symptoms, rheumatologists must consider a rare, but important, group of inherited disorders: the metabolic myopathies. However, their diagnosis often remains a challenge. Early recognition of these primary metabolic myopathies is essential to help prevent disease morbidity and mortality from rhabdomyolysis. Here, we focus on the metabolic myopathies that present…
New Tools for Myositis Diagnosis, Classification & Management
CHICAGO—At Hot Topics in Myositis, a session at the 2018 ACR/ARHP Annual Meeting, three experts discussed new classification criteria for idiopathic inflammatory myopathies (IIM) and offered practical primers on overlap myositis conditions and inclusion body myositis (IBM). New Myositis Classification Criteria After a 10-year development process, the new EULAR/ACR Classification Criteria for Adult and Juvenile…
Fellows’ Forum Case Report: Necrotizing Autoimmune Myopathy
Necrotizing autoimmune myopathy (NAM) is a relatively recently discovered subgroup of inflammatory myopathies. NAM is characterized by predominant muscle fiber necrosis and regeneration with little or no inflammation.1 One subgroup of NAM is 3-hydroxy-3-methylglutaryl-CoA reductase antibody (HMGCR Ab)-related immune-mediated necrotizing myopathy (IMNM), which occurs (rarely) after statin exposure, with a rough incidence of two per…
Myositis Mysteries
Why isn’t my myositis patient getting better?