Fig. 19From: Active surveillance of small renal massesContrast-enhanced US image showing a cystic renal lesion in the wall of the left kidney suspected of being a solid lesion. a Coronal contrast-enhanced CT showing a cystic renal mass with a hard-to-define image in its wall (arrow). c Unenhanced and (d) contrast-enhanced US clearly depicting enhancement on this solid nodule (arrows) in the cyst wall, leading to the lesion being defined and classified as a Bosniak II lesionBack to article page