Fig. 5
A 55-year-old man with a 2.5-cm single hepatocellular carcinoma (HCC). A Axial breath-triggered single-shot T2-weighted magnetic resonance imaging (MRI) showed a hyperenhancing mass in the S8 segment of the right liver near the hepatic margin. B Significant enhancement of the mass was seen in the arterial phase, with an ill-defined margin at the mass. C Axial single-shot diffusion-weighted imaging (DWI) (b = 800 s/mm2) and D apparent diffusion coefficient (ADC) maps showing a visually assessed diffusion restriction of the tumor. ADC and eADC were 0.973 × 10−3 mm2/s and 0.215, respectively, and the recurrence score exceeded the optimal cutoffs, thereby indicating a high risk of recurrence. Although a sufficient ablative margin was obtained (MAM > 5 mm), meaning that complete ablation was confirmed (E–F), tumor recurrence occurred in the right liver at 18 months after complete ablation (G)