Recent Advances in Idiopathic Inflammatory Myopathies (IIM) - Rapid Discoveries of Myositis-specific Antibodies (MSAS) and Myositis-Associated Antibodies (MAAS) - Moving Towards 'Precision Medicine'.

The progress in the understanding of inflammatory muscle diseases over the past several decades has been slow but steady. The classification given by Bohan and Peter's in 1975 was based on clinical features. It served well, but inadequacies were also obvious.