Fig 1.
Coronal CT images of an RCC (A) and lymphoma (B). In the RCC case, an ipsilateral internal iliac lymph node was enlarged (*). In the lymphoma case, a unilateral internal iliac lymph node was severe enlarged (**). Abbreviations: CT, computed tomography; RCC, renal cell carcinoma; T, tumor.
Table 1.
Computed tomography (CT) features of each renal tumor group.
Fig 2.
Representative axial pre-contrast (A) CT image of an RCC and post-contrast corticomedullary (B), nephrographic (C), and excretory (D) phase CT images of the RCC. The tumor had unilateral involvement and showed heterogeneous enhancement. Vessel enhancement (arrow) was detected in the post-contrast corticomedullary phase only. Abbreviations: CT, computed tomography; RCC, renal cell carcinoma.
Fig 3.
Representative axial pre-contrast (A) CT image of an HSA and post-contrast corticomedullary (B), nephrographic (C), and excretory (D) phase CT images of the HSA. The tumor had unilateral involvement and showed heterogeneous enhancement. Vessel enhancement was detected in all of the post-contrast images. The enhanced area of the tumor gradually expanded around the vessel (arrow). Abbreviations: CT, computed tomography; HSA, hemangiosarcoma.
Fig 4.
Representative axial pre-contrast (A) CT image of a lymphoma and post-contrast corticomedullary (B), nephrographic (C), and excretory (D) phase CT images of the lymphoma. The tumor had bilateral involvement and showed homogeneous enhancement (arrowhead). Abbreviations: CT, computed tomography.
Table 2.
Detail vessel enhancement features of each renal tumor group.
Fig 5.
CT attenuation values of RCC, lymphoma, and HSA on pre-contrast images and post-contrast corticomedullary, nephrographic, and excretory phase images.
Abbreviations: CT, computed tomography; HSA, hemangiosarcoma; RCC, renal cell carcinoma.