Figure 9. Mesenteric lymphadenopathy in a 54-year-old woman with metastatic malignant melanoma. The patient underwent resection of a skin lesion 4 years earlier. CT image shows low-attenuation lymphadenopathy (arrows). This appearance is not typical of malignant melanoma, which usually has homogeneous soft-tissue attenuation. Note the compression of the inferior vena cava (arrowhead).