The goal of this observational study is to evaluate clinical and oncologic outcomes in adult patients undergoing liver and/or biliary resection for benign and malignant diseases. This study evaluates postoperative morbidity and mortality within 90 days after surgery, as well as overall survival and disease-free survival in patients with malignant disease. Participants will: * undergo standard surgical and perioperative management according to routine clinical practice * have clinical, surgical, and follow-up data collected from institutional medical records * be followed for postoperative outcomes and long-term oncologic outcomes up to 5 years
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Postoperative morbidity at 30 days
Timeframe: Within 30 days after surgery
Postoperative mortality at 30 days
Timeframe: Within 30 days after surgery
Postoperative morbidity at 90 days
Timeframe: Within 90 days after surgery
Postoperative mortality at 90 days
Timeframe: Within 90 days after surgery
Overall survival (OS)
Timeframe: Up to 5 years after surgery
Disease-free survival (DFS)
Timeframe: Up to 5 years after surgery