<i>RAS</i>-Beppu Classification: A New Recurrence Risk Classification System Incorporating the Beppu Score and <i>RAS</i> Status for Colorectal Liver Metastases.

Disease-Free Survival According to the Beppu and RAS-Beppu Classifications The DFS curves of the three risk groups based on the Beppu and RAS -Beppu classifications were clearly separated, and there was a significant trend for shorter DFS as the risk increased ( Figure 2 ).

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