1　病历简介患者 ,女 ,2 3岁 ,学生。体检发现右肺球形占位病变。平素身体健康 ,无胸痛、咳嗽、咳血等症状。查体无特殊阳性体征。胸部X线正侧位片示右肺下叶背段有一直径约 3 .5cm球图 1　胸部X线正位示右肺下叶背段有一直径约 3 .5cm球形高密度阴影 ,边缘清晰、光滑 ,密度均 1 medical record Brief introduction Patient, female, 2 3 years old, student. Physical examination found that the right lung space-occupying lesions. Normal physical health, no chest pain, cough, hemoptysis and other symptoms. Physical examination no special positive signs. Chest X-ray shows the right lateral lobe of the right lower lobe has a diameter of about 3.5cm ball Figure 1 chest X-ray shows the right lower lobe of the back of a diameter of about 3.5 cm spherical high-density shadows, the edge of a clear, smooth, all