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A 24-year-old female patient with dermatomyositis, displaying inflammatory muscular oedema, and osteonecrosis in both knees. Coronal short-tau inversion recovery whole-body MRI (STIR-WBMRI) showed significantly increased muscle signal at both the shoulders, thighs and legs (black arrows), suggesting the presence of inflammatory oedema. Meanwhile, coronal STIR-WBMRI displayed osteonecrosis involving the bilateral distal femurs and proximal tibia (white arrows).
