224th ENMC International Workshop:

- Three distinct subtypes of immune-mediated necrotizing myopathies are defined.
- New pathological criteria for immune-mediated necrotizing myopathies are defined.
- Anti-HMGCR myopathy, anti-SRP myopathy and antibody negative IMNM are defined.
- Therapeutic recommendations for anti-HMGCR myopathy, anti-SRP myopathy are given.