病例14。本例中，两大血管血流方向正常，但是肺动脉较主动脉弓粗(图19)。

Case 14 In this case, both vessels have antegrade flow, but now the pulmonary artery is larger then the aorta (Figure 19).

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病例10。本病例中，两血管同为前向血流，且肺动脉内径小于主动脉弓(图15)。

Case 10 in this case, both vessels have antegrade flow, and the pulmonary artery is thinner than the aorta (Figure 15).

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结果：以左肺动脉受肿块压迫的表现，间接提示左喉返神经压迫征，分别来自主动脉弓下肿大淋巴结3例；

Result: Ultrasonic indirect sign of left larynx return nerve constricted must be depend on sign of left pulmonary constricted by lymph node mass from below aortic arch 3 cases;

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结果：以左肺动脉受肿块压迫的表现，间接提示左喉返神经压迫征，分别来自主动脉弓下肿大淋巴结3例；

Result: Ultrasonic indirect sign of left larynx return nerve constricted must be depend on sign of left pulmonary constricted by lymph node mass from below aortic arch 3 cases;

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