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Surgery for NCRNNE GI Liver Metastases Tied to Better 1-Year SurvivalSurgery Shows Better Survival for Certain Liver Metastases

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Key Takeaway
Interpret the 1-year survival benefit cautiously given non-significant 3- and 5-year results and high heterogeneity.

This meta-analysis synthesized 10 comparative studies evaluating surgical treatment of metachronous liver metastases from non-colorectal non-neuroendocrine (NCRNNE) gastrointestinal cancers. The comparator was non-surgical management, and the primary outcome was overall survival.

Surgically treated patients showed longer median overall survival, though the effect size and absolute numbers were not reported. At 1 year, overall survival was significantly higher with surgery compared with non-surgical management (RR=1.93, 95% CI=1.26-2.98). At 3 years, the trend favored surgery but was not statistically significant (RR=2.45, 95% CI=0.99-6.11). At 5 years, the trend also favored surgery but was not statistically significant (RR=2.26, 95% CI=0.97-5.29).

The authors noted substantial heterogeneity (I=67-86%), clinical and methodological variability across studies, and the influence of patient selection in the surgical cohorts. Safety data, including adverse events, serious adverse events, discontinuations, and tolerability, were not reported. Funding or conflicts of interest were not reported.

The findings suggest an association between surgical treatment and improved survival at 1 year, but the non-significant 3-year and 5-year results and the heterogeneity warrant cautious interpretation. The influence of patient selection on outcomes cannot be excluded.

Researchers analyzed data from 10 different studies to compare surgical treatment against non-surgical management for patients with metachronous liver metastases. These are specific types of liver cancer that spread from non-colorectal, non-neuroendocrine gastrointestinal cancers.

The analysis found that patients who underwent surgery had a longer median overall survival compared to those who did not. Specifically, patients who had surgery showed a significantly higher survival rate at the one-year mark. While the data showed a trend toward better survival at three and five years for those who had surgery, these specific results were not statistically significant.

It is important to note that this study had several limitations. There was a lot of variation in the methods and types of patients across the different studies included. Because of this variation and the fact that the three and five-year results were not statistically significant, these findings should be viewed as an association rather than a definitive rule. Patients should talk to their doctors to determine the best treatment plan based on their specific health needs.

What this means for you:
Surgery is linked to longer survival for some patients with specific types of liver cancer spread.

Common questions

Does surgery improve survival for liver metastases?

The study found that patients who underwent surgical treatment for these specific liver metastases showed a longer median overall survival compared to those who did not have surgery. Specifically, there was a significantly higher survival rate at the one-year mark for the surgical group.

What are the long-term results of surgery for this condition?

The data showed a trend toward better survival at three and five years for patients who had surgery. However, these specific results at the three and five-year marks were not statistically significant, meaning the long-term benefit is not yet clearly confirmed by this data.

How reliable are these findings for my treatment?

The results come from a meta-analysis of 10 studies, but there was a lot of variation in how those studies were conducted and which patients were chosen. Because of this variation, the results show a link rather than a certainty. You should discuss these findings with your doctor.

Study Details

Study typeMeta analysis
EvidenceLevel 1
Follow-up60.0 mo
PublishedOct 2026
View Original Abstract ↓
BACKGROUND/AIM: Hepatic resection is the standard of care for colorectal and neuroendocrine liver metastases, but its role for metachronous liver metastases from non-colorectal non-neuroendocrine (NCRNNE) gastrointestinal cancers remains controversial, with limited evidence and no established guidelines. The aim of this study was to evaluate whether surgical treatment of metachronous liver metastases is associated with improved overall survival compared with non-surgical management in patients with primary non-colorectal non-neuroendocrine gastrointestinal cancers. MATERIALS AND METHODS: A systematic review and meta-analysis was conducted to compare surgical treatment non-surgical management in patients with non-colorectal non-neuroendocrine gastrointestinal cancers and metachronous liver metastases. PubMed/MEDLINE, Scopus, and the Cochrane Library were searched for comparative studies published in English from 1 January 2005 to 8 December 2025. Studies reporting overall survival outcomes were included. Overall survival at 1, 3, 5 years was analyzed using relative risks (RR) with 95% confidence intervals (CI), and pooled estimates were calculated using a random-effects model. Between-study heterogeneity was assessed using the I statistic. RESULTS: Ten comparative studies were included. Surgically treated patients showed longer median overall survival. When survival was analyzed at fixed time points, surgical treatment was associated with significantly higher overall survival at 1 year compared with non-surgical management (RR=1.93, 95% CI=1.26-2.98), with a similar, though not statistically significant, trend favoring surgery at 3 years (RR=2.45, 95% CI=0.99-6.11) and 5 years (RR=2.26, 95% CI=0.97-5.29). Analyses showed substantial heterogeneity (I=67-86%), reflecting important clinical and methodological variability across studies and the likely influence of patient selection in the surgical cohorts. CONCLUSION: Surgical treatment of metachronous liver metastases from non-colorectal non-neuroendocrine gastrointestinal cancers was associated with longer median overall survival and significantly higher overall survival at 1 year compared with non-surgical management, with a favorable but not statistically significant trend at 3 and 5 years.
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