“…[1,2,4] Transbronchial needle aspiration and rapid on-site cytologic evaluation can reduce risk, costs, morbidity, and anxiety for patients, as well as the time to definitive treatments. [1][2][3][4][5] Surgical resection is considered as the best treatment method in NSCLC; however, clinical evidence indicates that patients with mediastinal lymph node (MLN) metastasis have poor prognosis. [2,3] Therefore, accurate MLN staging is critical for selecting patients suitable for surgery.…”