Tracheobronchomalacia(TBM)is a pathological phenomenon of excessive collapse of the trachea during exhalation due to the lack of cartilage hardness and support of the trachea.Its clinical manifestations are different degrees of cough,sputum,dyspnea,and even death from asphyxia.At present,it is widely believed that the gold standard for the diagnosis of TBM is fiberbronchoscopy,and the reduction of airway lumen area by more than 50%during expiratory breath is considered positive.The lack of specific clinical manifestations of TBM often leads to delayed treatment due to misdiagnosis and missed diagnosis.Therefore,this article reviews the diagnosis progress of TBM in order to improve the early diagnosis and treatment of TBM.
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