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Gastrointestinal Cancer Program

Anschutz Medical Campus

Gastrointestinal Cancer Research Labs

Messersmith Lab                      Pitts Lab

Gastrointestinal Cancer Clinical & Research Faculty


Alexis Leal MD

Assistant Professor



Alyce Kantner RN, BSN, MHA, ONC, NP-C

Instructor/Nurse Practitioner



 Melony Beatson MSN, NP, RN


 Christopher Lieu MD

Assistant Professor



Stephen Leong MD

Associate Professor



Rebecca Powell BS, MMS, PA-C

Instructor/Physicians Assistant




 Todd Pitts PhD

Assistant Research Professor



Professor With Tenure, Head, Division of Medical Oncology, Director, GI Program




 John Tentler PhD

Associate Professor






 Aik-Choon Tan PhD

Associate Professor




 W.Thomas Purcell MD, MBA

Associate Professor/ Executive Medical Director