Lacombe P, Lallemand D, Garel L, Sauvegrain J
AJR Am J Roentgenol. 1982 Nov;139(5):873-8. doi: 10.2214/ajr.139.5.873.
Left lower lobe collapse can be suspected in children on a frontal chest film when three or more peripheral left upper lobe vessels are seen end-on along the left heart border. The peripheral vascular changes are mainly due to the backward and downward displacement of the hilus. This "vascular nodule sign" was evident in 25 (70%) of 36 cases of left lower lobe collapse. Its frequency in normals is less than 10% and may be accounted for by lordotic projection. Although not entirely specific, this sign, easily noticeable even on an underexposed film, should raise the possibility of left lower lobe collapse.
当在胸部正位片上沿左心缘看到三条或更多左上叶外周血管呈轴位时，可怀疑小儿左肺下叶肺不张。外周血管改变主要是由于肺门向后下方移位所致。36例左肺下叶肺不张病例中，25例（70%）出现这种“血管结节征”。其在正常人中的出现率低于10%，可能与脊柱前凸投照有关。尽管该征象并非完全具有特异性，即使在曝光不足的胸片上也容易被注意到，但应提高左肺下叶肺不张的可能性。
