CTICasesExtensive Calcinosis in Dermatomyositis
Imaging findings
Chest radiograph in a middle-aged woman with long-standing dermatomyositis shows extensive plaque-like calcification within the soft tissues and muscles of the chest wall and around the joints, most pronounced around the shoulder girdle, with small lung volumes and scoliosis.
Key takeaways
The calcification represents dystrophic calcinosis related to chronic dermatomyositis rather than a primary metabolic calcium disorder. Extensive chest wall calcification of this degree can itself produce restrictive lung physiology from mechanical compression, independent of any underlying parenchymal lung disease.
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