患者，男，１２岁。少量痰血５ｄ，于１９９８年５月５日入院。曾有反复发作哮喘病史１０ａ，口服舒喘平能缓解。查体，两锁骨上淋巴结未及，两肺呼吸音清晰，胸片提示右下肺后基底段圆形阴影，７ｃｍ×７ｃｍ大小，边缘光滑。胸部ＣＴ提示右下肺后其底段椭圆形肿块阴影，... Patient, male, 12 years old. A small amount of blood stasis 5 days was admitted to hospital on May 5, 1998. There has been a history of recurrent asthma for 10 years. Oral asthma relieved. Physical examination showed that two supraclavicular lymph nodes were not present, and the breath sounds of the two lungs were clear. The chest radiograph suggested a rounded shadow of the basal segment of the right lower lung, 7 cm × 7 cm in size, and the edge was smooth. Chest CT reveals the shadow of the bottom elliptical mass behind the right lower lung,...