To evaluate the efficiency of endobronchial ultrasound for diagnosis of patients with suspected lung cancer. Subjects and methods: 82 patients with suspected primary lung cancer, treated at 103 Military Hospital and K3 Hospital located at Tan Trieu, Thanh Tri, Hanoi from January, 2013 to October, 2018. | Evaluating the efficiency of endobronchial ultrasound for diagnosis of patients with suspected lung cancer