肺结核发病以上肺叶居多 ,原发于下肺叶者较为少见 ,且其CT表现与上肺叶结核有一定差异。现将我院有完整临床资料的原发于下肺叶的肺结核 2 3例进行回顾性分析 ,以提高对下肺叶结核的诊断水平。1　材料与方法本组共 2 3例 ,男 14例 ,女 9例 ,年龄 17～ 5 1岁 ,平均 3 7岁 ,病程 The incidence of pulmonary tuberculosis mostly in the lungs, the primary lower lobe is relatively rare, and the CT manifestations and pulmonary tuberculosis have some differences. Now our hospital has a complete clinical data of primary pulmonary tuberculosis in the lower lobectomy 2 cases were retrospectively analyzed in order to improve the diagnosis of lower lobar tuberculosis. 1 Materials and Methods The group a total of 23 cases, 14 males and 9 females, aged 17 to 51 years old, an average of 37 years old, duration