病例患儿，男，３岁半。生后７个月发现胸骨旁右侧第５肋间有一黄豆大硬结，位皮下可推动，无症状，随年长进行性增大似儿头样，阴雨天隐痛，平卧因压迫致呼吸困难于１９９６年８月１６日入院。患儿有两幼弟，父因伤左腿致残，父母非近亲结婚，否认肿瘤家族史。体查：ＷＧ... Case of children, male, 3 years and a half. 7 months after birth found in the right side of the sternal fifth intercostal a soybean induration, the subcutaneous can promote, asymptomatic, with the elderly increased like head-like, rainy days of pain, supine due to pressure caused by breathing difficulties Admitted to hospital on August 16, 1996. Children have two young children, the disabled father left leg disability, parents marry non-relatives, denied the family history of cancer. Physical examination: WG ...