fig3

Figure 3. A: shows the TB arising from the trachea; B: an intraoperative bronchoscopy image which shows a right tracheal bronchus; C: shows the posterior segment bronchus (B2) arising from the intermedius bronchus; D: shows the arterial and bronchial supply post-resection. TB: tracheal bronchus; IMB: intermedius bronchus; LMB: left main bronchus