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CT-fluoroscopic imaging during cryoablation. (A) Pretreatment noncontrast CT shows a large, partially exophytic RCC in the right kidney (arrows). (B) Images obtained during treatment demonstrate multiple cryoprobes positioned within the mass. The cryozone can be visualized as a well-demarcated region of hypodensity in the surrounding tissue (arrows). CT, computed tomography; RCC, renal cell carcinoma.
