Background/Aim: The Geriatric Nutritional Risk Index (GNRI) is a prognostic indicator for several cancers; however, the association between the GNRI and colorectal liver metastasis (CRLM) remains unknown. Patients and Methods: Eighty patients who underwent hepatectomy for synchronous CRLM were divided into two groups based on the GNRI. Results: The preoperative CA19-9 levels were significantly higher in the low (GNRI ≤98; n=30) than the normal GNRI group (GNRI >98; n=50). Patients in the low GNRI group had poorer outcomes than those in the normal GNRI group. A low GNRI was an independent prognostic factor for recurrence-free survival and overall survival. Among 50 patients who experienced recurrence, only 16 of 22 patients (72.7%) in the low GNRI group could receive intensive treatment and 27 of 28 patients (96.4%) in the normal GNRI group. Conclusion: The GNRI is a simplified prognostic factor for patients with CRLM.Colorectal cancer is the third most common neoplasm worldwide and the second leading cause of cancer mortality (1). The liver is the most common site of colorectal cancer metastasis, and 15% to 25% of patients have colorectal liver metastasis (CRLM) at the time of diagnosis (2). Surgical resection of CRLM has been shown to significantly improve survival, with a reported 5-year survival rate of approximately 50% (3, 4); however, the incidence of postoperative recurrence remains high (5). Therefore, identification of relevant prognostic factors after hepatectomy for CRLM has become important.Metastatic cancers are associated with poor nutrition, which occurs in 37% of patients with metastatic digestive cancer (6). Cancer-associated malnutrition, termed cachexia, is associated with an impaired immune response, performance status, muscle function, quality of life, and tolerance of and response to chemotherapy, leading to a poor prognosis (7). Implementation of nutritional treatment is therefore warranted to improve the clinical outcome (8, 9), and more attention has been given to the correlation between cancer and the nutritional status.Several studies have shown a relationship between poor prognosis and several preoperative nutritional status markers, such as the neutrophil-to-lymphocyte ratio, modified Glasgow prognostic score, and prognostic nutritional index, in patients with CRLM (10-12). However, these nutritional status markers are directly affected by inflammatory markers. The Geriatric Nutritional Risk Index (GNRI) has been established to predict the risk of malnutrition-related morbidity and mortality in advanced age patients (13) and has been reportedly associated with a poor outcome in many diseases, including cancer (14-18). The GNRI is a wellestablished, simplified tool that is used to assess the nutritional status. This index combines only two nutritional indicators: the serum albumin level and the actual weight compared with the ideal weight. To date, however, the influence of the GNRI on outcomes after hepatectomy for CRLM has not been described. Thus, the present study was performed to ...