Robert S. Warren, MD, is a Professor of Surgery and a specialist in gastrointestinal and liver cancer. He earned a medical degree at the University of Minnesota, where he completed a general surgery residency. After completing an oncology research fellowship at Memorial Sloan-Kettering Cancer Center in New York, he was an associate physician at Rockefeller University in New York. A board-certified surgeon, Dr. Warren joined UCSF Medical Center in 1988. Highly respected by his peers, Dr. Warren was named to the list of U.S. News "America's Top Doctors," a distinction reserved for the top 1% of physicians in the nation for a given specialty. His research focuses on the biology of colorectal cancer and how it spreads. Dr. Warren is involved in clinical and laboratory research, which has centered on the biology of colorectal cancer metastasis that includes Vascular Endothelial Growth Factor (VEGF), Insulin-Like Growth Factors and Their Binding Proteins AS Modulators of Growth of Colorectal Cancer Metastases and Cytogenetics of Colorectal Cancer Metastasis. The laboratory work focuses on two areas: 1) autocrine growth factors and angiogenesis in colorectal cancer 2) molecular features which predict clinical outcome in primary and metastatic colorectal cancer.