74-year-old male with fatigue, weight loss, and proximal muscle weakness. Evaluate for myositis or other abnormality. MRI left femur: Moderate diffuse atrophy of the thigh musculature with edema signal, most compatible with myositis. No focal soft tissue lesion such as hematoma or abscess. Normal bone marrow signal.MRI right femur: Moderate diffuse atrophy of the thigh musculature with edema signal, most compatible with myositis. No focal soft tissue lesion such as hematoma or abscess. Normal bone marrow signal.
Moderate, symmetric atrophy and edema of the bilateral thigh musculature, most compatible with myositis.