结节病是一种病因未明 ,影响多器官的疾病 ,而肺是结节病最常累及的器官 ,90 %以上的患者在该病的某一时期有胸部影像学的异常[1] ,并且常以此而第一个提示结节病的诊断。临床上胸内结节病的诊断多根据胸部Ｘ线影像学变化 ,多数学者主张将Ｘ线分为 4期[1] 。我们在临床工作中发 Sarcoidosis is a disease of unknown etiology that affects multiple organs, and the lungs are the most commonly affected organs of sarcoidosis. More than 90% of patients have abnormal chest imaging during a certain period of the disease [1], and Often the first prompt diagnosis of sarcoidosis. Clinically, the diagnosis of intrathoracic sarcoidosis based on chest X-ray findings, most scholars advocate the X-ray is divided into 4 [1]. We are in clinical work