肺结核的好发部位为上叶尖段及后段,下叶各段(尤其下叶基底段)较少。1981年以来,我们先后收治入院前误诊为其它疾病的下叶肺结核50例。此50例占同时期住院肺结核816人次的6.1％年龄在16-18岁者4例,19-22岁者40例,23-25岁者5例,>25岁者1例。女:男=4:1。50例中童年有明确原发型肺结核史者21例,有结核性胸膜 The predilection site of tuberculosis is the upper segment and the posterior segment of the upper lobe, and the segments of the lower lobe (especially the basal segment of the lower lobe) are fewer. Since 1981, we have treated 50 cases of lower lobe pulmonary tuberculosis that were misdiagnosed as other diseases before admission. The 50 cases accounted for 816 of the same period of hospitalized tuberculosis in 6.1% of 16-18 years of age in 4 cases, 40 cases of 19-22 years of age, 23-25 ​​years of age in 5 cases,> 25 years of age in 1 case. Female: Male = 4: 1.50 cases of childhood primary clear history of pulmonary tuberculosis in 21 cases, with tuberculous pleura