Rémy J, Smith M, Marache P, Nuyts J P
J Radiol Electrol Med Nucl. 1977 Oct;58(10):621-30.
The so-called left "tracheal" bronchus is usually found to be a transposition of the segmental apicoposterior bronchus of the upper left lobe onto the terminal portion of the main trunk. This systematisation abnormality is less common on the left than on the right. In our experience, based on 1,500 bronchographs carried out on adults and children, we have discovered seven left "tracheal" bronchi four of them associated with an obstructive emphysema in the same area. Although this malformation is rarely encountered in the etiologies of interlobular or poly-segmental emphysemas in children, it does however appear that an upper left emphysema has two etiologies which are peculiar to it: segmental bronchial atresia and left "tracheal" bronchi. Why the left "tracheal" bronchi is more often pathogenetic in comparison with the right is open to speculation. As in many other examples of tracheo-bronchial compression for vascular reasons, the close contact between the hyperarterial ectopic bronchi and the left pulmonary artery seems, logically, to be the culprit.
所谓的左“气管”支气管通常被发现是左上叶段尖后支气管移位至主支气管末端。这种系统发育异常在左侧比在右侧少见。根据我们对成人和儿童进行的1500例支气管造影的经验，我们发现了7例左“气管”支气管，其中4例与同一区域的阻塞性肺气肿相关。虽然这种畸形在儿童小叶间或多段肺气肿的病因中很少见，但左上肺气肿似乎确实有两种特有的病因：段支气管闭锁和左“气管”支气管。与右侧相比，左“气管”支气管为何更常成为致病因素尚有待推测。与许多其他因血管原因导致气管支气管受压的例子一样，逻辑上，高动脉异位支气管与左肺动脉之间的紧密接触似乎是罪魁祸首。
