Gastrointestinal Oncology

Members interested in participating in the activities of the Gastrointestinal Oncology Section should contact us at We are especially interested in increasing participation of junior investigators, clinicians and international members.



The GIONC section is dedicated to expanding and advancing the science and practice of gastroenterology primarily by providing educational leadership in topics central to the initiation, progression, diagnosis and treatment of gastrointestinal tract cancers via high quality programming in clinical, translational and basic science research. The foci of the section are divided under two broad, inter-related themes of organ systems and GI cancer biology.

Areas of Focus:

The section presently has identified 18 specific areas of active and current foci, which are:

  1. Organ systems:  Biology, diagnosis and clinical therapeutics:
    • Esophageal and junctional neoplasms.
    • Gastric neoplasms.
    • Carcinoid and neuroendocrine neoplasms.
    • Liver and biliary cancers.
    • Pancreatic neoplasms.
    • Population health screening: GI cancer screening
  1. GI cancer biology:
    • Cancer Biomarkers.
    • Cancer Prevention and Chemoprevention.
    • Cancer Genomics, Epigenomics, Metabolomics, Proteomics, and Systems Biology.
    • Cancer Epidemiology.
    • Familial Cancer Syndromes and Cancer Genetics.
    • Tumor Cell Biology and Microenvironment.
    • Translational and Targeted Therapies for GI Cancers.
    • GI Cancer Research Models.
    • Nutrition, Obesity, Metabolism, and the Microbiome in GI Cancer.
    • Cancer Stem Cells and Circulating Tumor Cells.
    • Molecular Signaling Pathways in GI Cancers.
    • Inflammation and Immune Responses in GI Cancers.

Council Leadership

Rhonda Souza, MD, AGAF
John P. Lynch, MD, PhD
University of Pennsylvania


Andrew T. Chan, MD, MPH, AGAF
Massachusetts General Hospital
Vice Chair