Figure 11b. Mesenteric lymphadenopathy in a 38-year-old man with AIDS and Kaposi sarcoma. (a) CT image shows a homogeneous soft-tissue mass formed by mesenteric lymphadenopathy (top arrow). The mass surrounds the mesenteric vessels (bottom arrows) but does not occlude them. (b) CT image shows that the lymphadenopathy may also take the form of discrete masses in the mesentery (arrows).