“…Specifically, TO was found to develop: (1) 22 cases in trachea [3–5, 16, 18–20], (2) 2 cases where nodules were located from the first tracheal ring to the proximal main stem bronchi [17], (3) 22 cases in trachea and both main stem bronchi [2, 6, 11, 16, 19, 20], (4) 8 cases in trachea and main stem bronchus [3], without determining the number of the right and/or the left main stem bronchi, (5) 2 cases in trachea and left main stem bronchus [2, 20], (6) 1 case in trachea and left lingular bronchus [20], (7) 2 cases in trachea and right main stem bronchus [20], (8) 1 case in trachea and right intermedius bronchus [20], (9) 1 case in RUL bronchus [7], and (10) 1 case in right subsegmental B3b bronchus [8]. …”