A 24-year-old woman with left hip pain for 4 months was admitted. Radiographs of the left hip showed a radiolucent lesion in the proximal femur. The lesion demonstrated hypointensity on T1-weighted and high intensity on T2-weighted fat saturated images. Tc-MDP bone scan and F-FDG PET/CT illustrated intense radiotracer accumulation at the osteolytic lesion. Postoperative pathology confirmed a low-grade myofibroblastic sarcoma (LGMS). LGMS is a rare neoplasm, which often occurred in the head and neck region. Our case suggested that LGMS should be considered in the differential diagnosis of proximal femur lesion on Tc-MDP bone scan and F-FDG PET/CT.
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Hou et al. (2020) studied this question.
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