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![Long-term immune-modulatory side effects of radiofrequency ablation in patients with liver metastases and hepatocellular carcinoma](https://image.oaes.cc/1d95e659-0ef8-475e-8cbd-d02ffe0343d4/1158.fig.1.png)
Figure 1. Stimulation index of CD8+ T cells was determined by the ratio of IFNγ+CD8+ vs. IFNγ-CD8+ T cells after stimulation with autologous tumor antigens. Shown are mean ± SD. IFNγ: interferon gamma; CRC: colorectal cancer; HCC: hepatocellular carcinoma; RFA: radiofrequency ablation