Figure 6. (a, b) Enhanced CT scans in a 64-year-old woman with hyaline-vascular type of Castleman's disease demonstrating (a) enhancing para-aortic (arrows), (b) subaortic (arrowhead), (a,b) right paratracheal (curved arrow), and (b) left hilar (open arrow) nodes, separated from subaortic nodes by the first branch of the left pulmonary artery (wavy arrow). The hyaline-vascular type is most common, and usually presents as an asymptomatic, solitary lymph node mass in the middle or posterior mediastinum or hilum. The less common plasma-cell type is usually associated with systemic symptoms and disseminated disease.