Background: Hepatectomy 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.
Methods: From 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.
Results: There 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.
Conclusion: Hepatectomy 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.
Keywords: Hepatectomy; Liver; Metastases; Non-colorectal; Non-neuroendocrine; Survival.
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