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Follow up of microwave tumor ablation. (a) CECT shows a small renal lesion, partially exophytic, adjacent to a simple cyst, in the middle third of the left kidney; (b) Before the microwave treatment CEUS evidences a hyper-vascular, partially exophytic lesion (arrowheads); (c) After 12 h from the microwave ablation, CEUS shows an avascular area without recognizing the lesion (arrowheads), a sign of treatment success.
