A 56-year-od woman has recently diagnosed carcinoma of the breast. An x-ray
of the chest shows a tumor next to the right side of the heart. An enhanced
CT scan with the tumor invading the pericardium is shown.Which of the
following structures is most likely involved.
A. Coronary sinus
B. Greater splanchinic vein
C.Right phrenic nerve
D.Right Vagus nerve
E.Thoracic duct
我的选择是D， 但错了。正确答案是C. 能请哪位高手给个详细的解释吗？图这里粘贴
不出来。
D****6 发帖数: 68
2
right phrenic nerve 起源于颈部，在右肺和右心缘之间下行至横隔，x-ray显示肿瘤
位于心脏右侧，那么就是右侧乳腺来源，CT显示肿瘤已经蔓延累及右心缘，那么位于两
者之间的phrenic nerve 也会累及。
