1　病例报告患者男 ,15岁。因咳嗽、痰中带血 1个月入院。入院诊断 :左肺下叶占位。患者 10年前在外院行肝肿瘤切除术 ,术后病理示肝母细胞瘤。术后未行放疗及化疗。查体 :发育正常 ,营养中等。左肺下野叩实 ,呼吸音低。右上腹见 10ｃｍ长陈旧手术疤痕。胸部ＣＴ示左肺下叶中心 1 Case report Male patient, 15 years old. Due to cough, bloody sputum was admitted to the hospital for 1 month. Admission diagnosis: left lung lobe occupying position. The patient underwent liver tumor resection 10 years ago. His postoperative pathology showed hepatoblastoma. No radiotherapy and chemotherapy were performed after surgery. Physical examination: normal development, moderate nutrition. The left lung is poor and the breath sounds are low. 10cm old surgical scars are seen in the right upper abdomen. Chest CT shows left lower lobe center