Phase II Trial of Immunonutrition in Hepatectomy

This study is looking at whether a special pre-surgery diet called immunonutrition — which includes nutrients like arginine and fish oil — can improve recovery for patients having a major liver surgery to remove tumors. Researchers want to know if eating this diet before the operation leads to better outcomes. **You may be eligible if...** - You are 18 or older - You have a liver tumor and are scheduled for a major liver resection (removal of 3 or more liver sections) - Your overall health is classified as ASA Class 1, 2, or 3 **You may NOT be eligible if...** - You have severe kidney failure (low kidney filtration rate) - You have a known allergy to arginine, omega-3 fatty acids, or nucleotides - You are unable to eat by mouth Talk to your doctor to see if this trial is right for you.