Thoracolumbar paraspinal myopathy as the cause of camptocorm
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A patient presented with a relatively acute onset of camptocormia and new-onset back pain. Upon examination, she had asymmetric parkinsonism. Magnetic resonance imaging of the lumbar spine revealed alterations in muscle signal intensity in the right paraspinal muscles at the L1–2 level. In the presence of persistent back pain, repeat imaging done two months later showed diffuse enlargement and patchy enhancement of the paraspinal muscles on T1-weighted imaging from T4 through sacrum bilaterally. About fifteen months after the onset of camptocormia, she underwent ultrasound-guided gun biopsy of the paraspinal muscles for evaluation of focal atrophy of the back muscles on the right. The biopsy revealed unmistakable myopathic changes, marked endomysial and perimysial fibrosis of the muscles, and merely mild infiltration of inflammatory cells but no clues regarding the cause of myopathy...

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