Proposal of a novel H category-based classification of colorectal liver metastases based on a Japanese nationwide survey.

<h4>Background</h4>The conventional H category-based classification for colorectal liver metastases (CRLM) was created by equal weighting of tumor number and tumor size; however, our previous nomogram to predict postoperative disease-free survival demonstrated that CRLM ≥5 as a parameter provided 4.... View More