Resul ts 5 cases were diagnosed to benign nodules,2 cases were correctly diagnosed , one was misdiagnosed as lung cancer and one was misdiagnosed as tuberculosis bef ore operation.

• 结果:术前诊断良性肿瘤者5例,明确诊断为错构瘤2例,其中误诊为肺结核1例,误诊为肺癌者1例。