Comparison of post-hepatectomy long-term survival outcome between non-colorectal non-neuroendocrine and colorectal liver metastases: A population-based propensity-score matching analysis

Abstract

BackgroundHepatectomy is an established treatment for colorectal liver metastasis (CLM) or neuroendocrine liver metastasis. However, its role in non-colorectal non-neuroendocrine liver metastasis (NCNNLM) is controversial. This study aims to compare long-term survival outcomes after hepatectomy between NCNNLM and CLM in a population-based cohort. MethodsFrom 2009 to 2018, curative hepatectomy were performed in 964 patients with NCNNLM (n ​= ​133) or CLM (n ​= ​831). Propensity score (PS) matching was performed. Short-term and long-term outcomes were compared between PS-matched groups. Univariate and multivariate analyses were performed to identify prognostic factors affecting survival. ResultsThere were 133 patients in the NCNNLM group and 266 patients in the CLM group. The mortality (1.5 ​% vs 1.5 ​%) and morbidity (19.5 ​% vs 20.3 ​%) rates were comparable between the two groups. There was no statistically significant difference in 5-year overall (48.9 ​% vs 39.8 ​%) and recurrence-free (25.1 ​% vs 23.4 ​%) survival rates between NCNNLM and CLM groups. A high pre-operative serum bilirubin level, severe postoperative complications and multiple tumors were independent prognostic factors for poor survival. ConclusionHepatectomy for selected patients with NCNNLM can achieve similar long-term oncological outcomes as those with CLM. High serum bilirubin, severe postoperative complication and multiple tumors are poor prognostic factors for survival.