“…TM is generally segmentary, located in the thoracic segment above the carina; it does not exceed 1 cm in length, and the aortic arch often significantly influences the dynamics of the obstruction [3]. Subsequent studies have, nevertheless, underlined that the obstructive dynamics of a TM can also be influenced by the epiaortic vessels [4,5], and/or the pulmonary artery [6]. The situation can be further complicated if it is present in a right aortic arch, or the malacia involve one or both main-stem bronchi, or the TM is intrinsic and is not correlated to compression by the great mediastinal vessels.…”