患者女,59岁。主因发现左前臂肿物6个月收入院。查体:左前臂背侧中段可见一大小约10*5cm大小肿物,肤色正常、表面无静脉怒张,边界模糊,活动性差,质硬,无压痛,皮温正常(如图1)。左肘关节、腕关节及左手各指感觉运动可。门诊平片初步诊断考虑左侧尺桡骨骨髓炎表现,骨肿瘤不除外,建议进一步CT检查(如图2、3)。入院后胸部平片常规检查:双侧第2前肋骨质密度不均,右上肺占位性病变(如图4)。胸部CT示:右肺上叶占位(如 Female patient, 59 years old. The main reason for the discovery of left forearm tumor 6 months income hospital. Examination: the left forearm in the middle of a size of about 10 * 5cm size of the tumor, normal skin color, surface without venous rash, fuzzy boundaries, poor mobility, hard, no tenderness, normal skin temperature (Figure 1). Left elbow, wrist and left hand can refer to sensory movements. Outpatient radiographs preliminary diagnosis of ulnar radius osteomyelitis left foot performance, bone tumor is not excluded, it is recommended further CT examination (Figure 2,3). Chest radiographs after admission routine examination: bilateral anterior rib density uneven, right upper lung space-occupying lesions (Figure 4). Chest CT showed: upper right lung occupancy (eg