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Fig. 3B. —68-year-old man with local tumor progression and abscess formation after radiofrequency ablation of hepatocellular carcinoma (tumor number 4 in Table 1). Oblique sonogram obtained during radiofrequency ablation shows slightly hypoechoic hepatocellular carcinoma (arrows) that abuts colon (C). Note hooklike tines (arrowheads) of 3.5-cm multitined expandable electrode. Two overlapping ablations with tines partially deployed were performed for 15 min.