Is hepatic resection justified for non-colorectal non-neuroendocrine liver metastases? A systematic review and meta-analysis.

Hepatic resection (HR) is effective for colorectal or neuroendocrine liver metastases. However, the role of HR for non-colorectal non-neuroendocrine liver metastases (NCNNLM) is unknown. This study aims to perform a systematic review and meta-analysis on long-term clinical outcomes after HR for NCNNLM. electronic search was performed to identify relevant publications using PRISMA and MOOSE guidelines. Primary outcomes were 3- and 5-year overall survival (OS) and disease-free survival (DFS). Secondary outcomes were post-operative morbidity and 30-day mortality. There were 40 selected studies involving 5696 patients with NCNNLM undergone HR. Pooled data analyses showed that the 3- and 5-year OS were 40% (95% CI 0.35–0.46) and 32% (95% CI 0.29–0.36), whereas the 3- and 5-year DFS were 28% (95% CI 0.21–0.36) and 24% (95% CI 0.20–0.30), respectively. The postoperative morbidity rate was 28%, while the 30-day mortality was 2%. Subgroup analysis on HR for gastric cancer liver metastasis revealed the 3-year and 5-year OS of 39% and 25%, respectively. HR for NCNNLM may achieve satisfactory survival outcome in selected patients with low morbidities and mortalities. However, more concrete evidence from prospective study is warrant in future. • Pooled data analyses of high quality studies on NCNNLM • Three-year overall survival (OS): 40%; 5-year OS: 32% • Three-year disease-free survival (DFS): 28%; 5-year DFS: 24% • Postoperative morbidity: 28%; 30-day mortality: 2%. • Hepatic resection for NCNNLM may result in satisfactory survival outcome. [ABSTRACT FROM AUTHOR]