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Value of ultrasonography. A,B: Axial CT sections shows homogeneously hypodense, exophytic, circumscribed lesion (asterisks) in the middle third of the left kidney, with questionable contrast enhancement (18 HU difference). C: Cross sectional US clearly demonstrates a solid lesion (asterisk) with some areas of sound beam attenuation. Papillary carcinoma was confirmed after surgical resection.
