Fig. 1

Flowchart of the study. The rebiopsy and initial biopsy groups were extracted and analysed according to the flowchart. *Failure, failed to pathological diagnosis; †Success, succeeded in pathological diagnosis; ‡Due to clinical trial, the purpose of biopsy was to collect specimens for the registration of clinical trials; NSCLC, non-small cell lung cancer; SCLC, small cell lung cancer; Sq, squamous; TBB, transbronchial biopsy