PILOT TRIAL FOR THE EVALUATION OF HEPATOTEST IN PREOPERATIVE ASSESSMENT IN LIVER FUNCTION.

Primary objectives: Evaluate the effectiveness of Hepatotest in assessing preoperative liver function in patients with liver metastases who have received chemotherapy. The correlation of active ingredients and metabolites in blood and urine, and liver enzyme activity in liver biopsy will be studied. Primary endpoints: Correlation of active ingredients and metabolites in blood and urine, and liver enzyme activity in liver biopsy.