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FIGURE 9. Patient (56-y-old man) 1 y after local resection of hepatic metastasis. (A) Two hypodense lesions (arrow and arrowhead) were found on contrast-enhanced CT, but differentiation of viable tumor tissue from postoperative tissue alteration was not possible. (B) PET imaging demonstrated viable tumor tissue but without additional ability to accurately localize lesion within liver. (C) On fused PET/CT, lateral hepatic lesion was identified as local tumor recurrence (arrow), and medial lesion was caused by postoperative tissue alteration (arrowhead). (D–F) Radiofrequency ablation was selectively performed on lateral lesion, and complete tumor ablation was shown on postinterventional follow-up scan.
