Imaging and Management of Incidental Renal Lesions

Figure 13

Cystic neoplasm (Bosniak category III). US examination shows a large inhomogeneous hypoechoic mass (arrow) in the third middle of the right kidney (a). At CEUS, enhancement of intralesional septa and nodulations (arrowhead) is also detectable (b). MRI in the same patient (c–f). The mass (arrow) is characterized by an inhomogeneous mild hyperintensity on axial GE T1-weighted image (c) and a central area of hyperintensity on axial T2-weighted TSE image (d). Axial contrast-enhanced GE T1-weighted fat-sat image (e) and subtracted image (f): enhancement of the small solid peripheral component is better depicted on the subtracted image, with similar CEUS appearance.

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