- Etiology: autoimmune inflammatory myositis with multisystemic features
- Radiograph: calcification is complication of longstanding or severe disease and is best seen on radiographs
- MRI: widespread and diffuse / bilateral and often symmetrical STIR / T2 hyperintensity in proximal muscles without atrophy, anterior compartment dominant (vastus lateralis / intermedialis)
- Clinical: proximal weakness, puritic rash on exposed skin especially extensor surfaces (heliotrope rash)
Radiology Cases of Dermatomyositis
