患者　女 ,2 2岁 ,以间断性右侧胸部钝痛、气短 14年就诊。胸部X线检查发现 :右前纵隔肿块 ,大小约 6cm× 7cm ,上方有不规则钙化影。CT平扫发现 :肿块位于前纵隔的上腔静脉及主动脉根部前方 ,大小约 7cm× 6cm× 5cm ,呈混杂密度 ,前内侧有不规则骨化密度影 ,外侧方呈软组织密 Female patient, 2 2 years old, with intermittent right chest dull pain, shortness of breath 14 years treatment. Chest X-ray examination found: right anterior mediastinum mass, size of about 6cm × 7cm, above the irregular calcification. CT scan found: mass in the anterior superior mediastinum and the superior vena cava aortic root in front of the size of about 7cm × 6cm × 5cm, were mixed density, before the medial irregular density of ossification, the lateral soft tissue density