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Gastrointestinal Cancer Clinical and Research Faculty


Co-Division Head/Director, Phase I Program

Wells A. Messersmith, MD
Professor/Co-Division Head/
Director, GI Oncology Prog​ram

John Arcaroli, MS, PhD

Assistant Professor



Todd Pitts, MS

Research Instructor



W. Thomas Purcell, MD, MBA     Associate Professor/
Executive Medical Director, Oncology Services

Stephen Leong, MD

Associate Professor



Mary Kay Schultz, MSN, NP


Anne Leyba, MSN, NP




Aik Choon Tan, PhD

Associate Professor,

Christopher Lieu, MD

Assistant Professor     



John Tentler, PhD

Associate Professor




Colin D. Weekes, MD, PhD

Associate Professor​


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