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Your Medical Team


Surgeons

Steven Ahrendt, MD

Steven A. Ahrendt, MD, FACS

Surgeon

Dr. Ahrendt received both his General Surgery and Surgical Oncology training at the Johns Hopkins University. He has been on the faculty of the Johns Hopkins University, the Medical College of Wisconsin, the University of Rochester, and the University of Pittsburgh. He joined the faculty at the University of Colorado in May 2017 and serves as Director of the Cytoreductive Surgery and HIPEC program. He specializes in treating patients with complex gastrointestinal malignancies, including primary and metastatic colon and appendiceal cancer, with an emphasis on peritoneal surface malignancies or carcinomatosis. His research on cytoreductive surgery with intraperitoneal chemotherapy has been published in leading surgical journals. (View profile)

Ana Gleisner, MD, PhD

Ana Gleisner, MD, PhD

Surgeon

Dr. Gleisner received her General Surgery training at the Saint Louis University and completed a fellowship in Surgical Oncology at University of Pittsburgh Medical Center. She specializes in treating gastrointestinal cancers, including primary and metastatic colon and rectal tumors, with emphasis on minimally invasive surgery as well as on tumor debulking and hyperthermic perfusion. She has been with the University of Colorado School of Medicine since 2015 and is board certified in general surgery. Her research interests focus on the comparison of the efficacy of different surgical treatments for cancer being used across the country. (View profile)

Medical Oncologists

S. Lindsey Davis, MD

S. Lindsey Davis, MD

Medical Oncologist

Dr. Davis completed her internal medicine and medical oncology training at the University of Colorado, and served as Chief Medical Resident and Chief Oncology Fellow in these programs. She is a member of the Gastrointestinal Medical Oncology Program as well as the Developmental Therapeutics Program at the University of Colorado. Her research interest is in novel targeted therapies and immunotherapies for colorectal cancer.

Stephen Leong, MD

Stephen Leong, MD

Medical Oncologist

Dr. Leong received his medical training at the Royal College of Surgeons in Ireland and Albert Einstein Medical Center in Philadelphia. He then trained in medical oncology at the University of Colorado Cancer Center. He joined the UCH faculty in 2007. He is a member of the Gastrointestinal Malignancies and Developmental Therapeutic Programs, where he conducts research and clinical trials in colorectal cancer.

Christopher Lieu, MD

Christopher Lieu, MD

Medical Oncologist

Dr. Lieu joined the University of Colorado School of Medicine faculty as an Assistant Professor of Medicine in July 2011. He trained in internal medicine at the University of Colorado, where he also served as a Chief Medical Resident. He completed his fellowship training in medical oncology at the University of Texas MD Anderson Cancer Center and served as the Chief Medical Oncology Fellow in 2010. He currently serves as the Director of GI Medical Oncology at the University of Colorado Cancer Center, is a member of the National Cancer Institute Colon Cancer Task Force, and serves on the National Comprehensive Cancer Network (NCCN) Panel for Neuroendocrine Cancers.

Wells Messersmith, MD

Wells Messersmith, MD

Medical Oncologist

Dr. Messersmith trained at Harvard Medical School and Johns Hopkins. He joined the UCH faculty in 2007. Dr. Messersmith conducts both local and national translational clinical trials in cancers of the pancreas, colon, liver, and gastrointestinal tract. He serves as Head of the Division of Medical Oncology and co-Leader of Developmental Therapeutics at the University of Colorado Cancer Center.

W. Thomas Purcell, MD, MBA

W. Thomas Purcell, MD, MBA

Medical Oncologist

Dr. Purcell trained in Internal Medicine and Medical Oncology at the Emory University School of Medicine, followed by residency training at University of Texas Southwestern Medical Center/Parkland Hospital in Dallas, Texas. He then completed fellowship training in Medical Oncology at Johns Hopkins Sidney Kimmel Comprehensive Cancer Center in Baltimore, Maryland. Dr. Purcell joined the faculty of the University of Colorado in May of 2012. He is currently the Executive Medical Director of Oncology Services and Associate Director for Clinical Services at the University of Colorado Cancer Center.

Clinic Coordinator

Whitney K. Herter, PA-C

Whitney K. Herter, PA-C

Peritoneal Cancer Multidisciplinary Clinic Coordinator

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