Figure 9. Non-enhanced CT scan in the same patient as in Figure 7 revealing enlarged, calcified para-aortic nodes (station 6; arrows), lying anterior and lateral to the aortic arch (A) below its superior margin. Also seen is right lower paratracheal lymphadenopathy (station 4R; open arrow). V = superior vena cava. (From Glazer HS, Molina PL, Siegel MJ, Sagel SS. High-attenuation mediastinal masses on unenhanced CT. AJR Am J Roentgenol 1991;156:45–50 [8]. Reprinted with permission).