Gastric cancer liver metastasis: Optimal management for oligo-metastatic disease.

Abstract

136 Background: The role of surgery for gastric cancer liver metastasis (GCLM) has not been established and particularly, the optimal management for liver-isolated, oligo-GCLMs remains controversial. The aims of this study were to review the outcomes for our patients with GCLM who underwent liver resection and to define the optimal selection criteria for resection. Methods: The medical records of patients who underwent liver resection for GCLMs with curative intent at our institution from 1993 through 2018 were reviewed. Our criteria for liver resection included absence of extrahepatic disease, and the limited number of liver metastasis (often 3 or less). Results: Total 101 patients with GCLM (77 men [76%], median age 66 years) were included. Forty-seven patients (46%) had synchronous metastasis and all underwent simultaneous resection with the primary disease. Those with synchronous disease received neoadjuvant therapy more often than those with metachronous disease (63% vs 37%, p = 0.021). Median RFS and OS for the entire cohort were 11 months and 39 months, respectively, and 5-year-OS rate was 41%. Of note, 25 patients achieved survival longer than 5 years without any recurrence thereafter with median follow-up of 137 months. In the multivariate analyses, elevated CEA 50 ng/ml or greater and nodal status of the primary were associated with shorter RFS, while primary T4 disease, liver tumor 5cm or great and elevated CEA were associated with shorter OS (Table 1). Conclusions: For well selected patients with GCLM, liver resection is an effective therapy not only to prolong disease-free time, but also to achieve cure. CEA is useful to select patients with GCLM who unlikely benefit from aggressive surgery. [Table: see text]