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Indeterminate lesion. (a) 56-year-old man in follow-up for esophageal neoplasia. CECT acquired only in the portal phase. At the lower pole of the right kidney, there is a sharp-edged formation with equivocal enhancement (curved arrow); (b) B-mode US shows a hyperechoic solid lesion (curved arrow) which appears (c) hypovascularized in all vascular phases compared to the parenchyma on CEUS (curved arrow).
