患者男,35岁,因左大腿疼痛来院就诊。患者无明显诱因出现大腿疼痛,呈持续性轻度隐痛,无放射痛,自觉左侧大腿下段发紧,自服止痛药后无明显缓解。体检:左大腿下段较对侧稍肿胀,可及深压痛,局部皮温无明显增高,无血管怒张及皮肤发红。余未见确切异常。X线表现:左侧股骨中下段溶骨性骨质破坏,大小约13.7 cm×4.5 cm,呈膨胀性生长,其内密度不均,见多房囊 Male patient, 35 years old, came to the hospital due to left thigh pain. Patients with no obvious incentive to appear thigh pain, persistent mild dull pain, no radiating pain, aware of the lower thigh tightening, since taking painkillers no significant relief. Physical examination: the lower thigh lower than the contralateral slightly swollen, and deep tenderness, no significant increase in local skin temperature, avascular tension and skin redness. I did not see the exact exception. X-ray findings: the left femur osteolytic bone destruction, the size of about 13.7 cm × 4.5 cm, was swollen growth, the density of uneven, see the multi-atrial capsule