支原体肺炎是儿科常见的肺部感染性疾病 ,常见 5岁以上的儿童和青少年[1] ,随着诊断技术的提高 ,婴幼儿支原体肺炎有所增加的趋势。然而 ,由于其临床症状不典型及 X线胸片不典型 ,常被误诊为肺门淋巴结核。为了进一步提高对其诊断水平 ,我们收集了 1 997年 1月至 1 998年 1 0月 Mycoplasma pneumonia is a common pediatric pulmonary infectious disease, common in children and adolescents over the age of 5 [1], with the improvement of diagnostic techniques, infant Mycoplasma pneumonia tends to increase. However, it is often misdiagnosed as hilar lymph node tuberculosis because of its atypical clinical symptoms and atypical chest X-ray findings. In order to further improve their diagnostic level, we collected from January 1997 to January 1998