**12. Metastases and lymphoma**

Imaging features suggestive for metastasis or lymphoma are: size <3 cm, lack of spherical shape, "infiltrative" growth, multiplicity, and bilaterality. There are no capsules or calcifications [8].

**Figure 11.** Renal lymphoma. CEUS evaluation (left) with an area of hypoenhancement at the upper pole; gray scale evaluation (right) with no signs of tumor. Vascular evaluation seems to be superior for the diagnostic than the morphometric pattern.

Few case reports depicted CEUS vascular pattern of renal metastasis, which are hypovascular on all phases [8]. Renal lymphoma was also described as hypovascular throughout renal perfusion after contrast agent administration on ultrasound (**Figure 11**) [8].
