Müller N L, Webb W R, Gamsu G
Radiology. 1985 Sep;156(3):761-5. doi: 10.1148/radiology.156.3.4023240.
Possible signs of paratracheal lymphadenopathy on the posteroanterior (PA) chest radiograph were assessed in 98 patients and correlated with computed tomography (CT). The nodes were normal in size in 62 patients and enlarged (greater than 15 mm) in 36. Among the latter group, widening of the right paratracheal stripe was seen in 11 (31%) and enlargement of the azygos node in 15 (42%). While the lateral contour of the superior vena cava (SVC) was convex in 46 patients (47%), 81 (83%) had an increased density in the region of the SVC. When all four parameters were combined, lymphadenopathy could be detected on the PA view in 87 patients (89%). CT demonstrated that the enlarged nodes were anterolateral rather than directly lateral to the trachea and also immediately posterior to the SVC, explaining the findings on the PA radiograph.
对98例患者的后前位（PA）胸部X线片上气管旁淋巴结肿大的可能征象进行了评估，并与计算机断层扫描（CT）结果进行了对比。62例患者的淋巴结大小正常，36例患者的淋巴结肿大（大于15mm）。在后一组中，11例（31%）可见右气管旁条纹增宽，15例（42%）奇静脉淋巴结肿大。虽然46例患者（47%）上腔静脉（SVC）的外侧轮廓呈凸形，但81例（83%）患者SVC区域密度增加。当将所有四个参数结合起来时，87例患者（89%）的PA视图上可检测到淋巴结肿大。CT显示，肿大的淋巴结位于气管的前外侧而非直接外侧，且紧邻SVC后方，这解释了PA胸片上的表现。
