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患者女,17岁。因“左上臂肿块切除术后3年,伴压痛1年余”入院。查体:左上肢肿胀,局部压痛,叩击痛阳性,活动尚可,肢端血运感觉活动尚可,余阴性。实验室检查:无明显异常。MRI:左上臂肱骨外侧肿块。超声所见:左侧上臂皮下见一大小约3.6cm×1.5cm×1.5cm的低回声团块,边界尚清,形态不规则,内部回声不均匀,内未探及血流信号,其端侧与桡神经相连(图1)。超声提示:左侧
Female patient, 17 years old. Because of “left upper arm tumor resection after 3 years, with more than 1 year of tenderness” admission. Physical examination: left upper limb swelling, tenderness, percussion pain positive, activity is acceptable, acromegaly acuity can still activity, Yu negative. Laboratory tests: no obvious abnormalities. MRI: Lateral humerus lateral mass. Ultrasound seen: the left upper arm subcutaneous see a size of about 3.6cm × 1.5cm × 1.5cm hypoechoic mass, the boundary is clear, irregular shape, internal echo uneven, not within the probe and blood flow signal, the end Connected with the radial nerve (Figure 1). Ultrasound Tip: Left