| Inflammatory myopathy | |
|---|---|
| Other names | Idiopathic inflammatory myopathy |
 | |
| Gottron's papules on the hand of a patient with juvenile dermatomyositis | |
| Specialty | Rheumatology  |
Inflammatory myopathy, also known as idiopathic inflammatory myopathy (IIM), is disease featuring muscle weakness, inflammation of muscles (myositis), and in some types, muscle pain (myalgia). The cause of much inflammatory myopathy is unknown (idiopathic), and such cases are classified according to their symptoms and signs, electromyography, MRI, and laboratory findings. It can also be associated with underlying cancer. The main classes of idiopathic inflammatory myopathy are polymyositis (PM), dermatomyositis (DM) (including juvenile, amyopathic, and sine-dermatitis form), inclusion-body myositis (IBM), immune-mediated necrotising myopathy (IMNM), and focal autoimmune myositis.[1]
- ^ Szczęsny P, Świerkocka K, Olesińska M (2018). "Differential diagnosis of idiopathic inflammatory myopathies in adults - the first step when approaching a patient with muscle weakness". Reumatologia. 56 (5): 307–315. doi:10.5114/reum.2018.79502. PMC 6263305. PMID 30505013.