Ryan C. Fields, MD

Ryan C. Fields, MD

Kim and Tim Eberlein Distinguished Professor


Specialty Areas

  • Surgical oncology
  • Surgical treatment of cancer including tumors of the:
    • Upper gastrointestinal tract (stomach and small intestine)
    • Pancreas
    • Liver (primary liver tumors, metastatic liver tumors)
    • Biliary tract (gallbladder and bile ducts)
    • Skin and soft tissues
  • Benign conditions of the upper digestive and hepato-pancreato-biliary system

Common Procedures

  • Gastric resection (gastrectomy)
  • Small bowel resections
  • Pancreatic resection (including pancreaticoduodenectomy or Whipple procedure)
  • Liver resections
  • Bile duct resections and reconstructions
  • Resection of retroperitoneal and extremity sarcaoma, including multi-visceral resection
  • Cholecystectomy
  • Skin and soft tissue resections/excisions
  • Sentinel lymph node biopsy for skin cancer
  • Lymph node dissections for skin cancer
  • Isolated limb infusion (ILI) for advanced skin and soft tissue tumors of the extremities

Common Diagnoses Treated

  • Gastric cancer
  • Pancreatic cancer
  • Cholangiocarcinoma
  • Gallbladder cancer
  • GI stromal tumors (GIST)
  • Small bowel cancers
  • Neuroendocrine tumors of the pancreas and small bowel (carcinoid tumors)
  • Sarcoma (retroperitoneal and extremity)
  • Skin cancers (including melanoma, Merkel cell carcinoma, squamous cell carcinoma and basal cell carcinoma)
  • Benign conditions of the upper digestive tract, including:
    • Gallstones (cholelithiasis)
    • Biliary colic
    • Peptic/gastric ulcer disease
    • Pancreatitis

Board Certifications

American Board of Surgery / General Surgery


Medical School: Duke University School of Medicine, Durham, NC, 2003


2003 – 2005 Junior Resident, General Surgery, Barnes-Jewish Hospital, Washington University Medical Center, St. Louis, MO

2006 – 2008 Senior Resident, General Surgery, Barnes-Jewish Hospital, Washington University Medical Center, St. Louis, MO

2008 – 2009 Administrative Chief Resident, General Surgery, Barnes-Jewish Hospital, Washington University Medical Center, St. Louis, MO


2005-2006 Research Fellowship, Departments of Surgery and Immunology, Barnes-Jewish Hospital, Washington University Medical Center, St. Louis, MO

2009-2011 Surgical Oncology Fellowship, Memorial Sloan-Kettering Cancer Center, New York, NY

Professional Memberships

2019 – present, American Surgical Association
2019 – present, Society of Clinical Surgeons
2019 – present, Southern Surgical Association
2017 – present, Society of University Surgeons (SUS)
2013 – present, International Hepato-Pancreato-Biliary Association (IHPBA)
2012 – present, Association of Program Directors in Surgery (APDS)
2011 – present, American College of Surgeons, Missouri Chapter
2011 – present, St. Louis Surgical Society
2010 – present, Association of Academic Surgery (AAS)
2009 – present, American Hepato-Pancreato-Biliary Association (AHPBA)
2009 – present, American Society of Clinical Oncology (ASCO)
2008 – present, Alpha Omega Alpha (ΑΩΑ)
2005 – present, American Association for Cancer Research (AACR)
2004 – present, Society of Surgical Oncology (SSO)
2003 – present, American College of Surgeons (ACS)

Awards and Honors

2015 – present, Best Doctors in America

2014, St. Louis Business Journal “40 Under 40” class of 2014

2011, Michael E. Burt, M.D., Ph.D. Award for Clinical Excellence, Memorial Sloan Kettering Cancer Center, New York City, NY

2011, David and Monica Gorin Sarcoma Fellow, Memorial Sloan-Kettering Cancer
Center, New York City, NY

2010, American Society of Clinical Oncology Cancer Foundation Merit Award

2009, Eugene M. Bricker Teaching Award, Department of Surgery, Barnes-Jewish
Hospital, Washington University School of Medicine

2008, James Ewing Foundation Resident Research Award, Society of Surgical
Oncology 61st Annual Cancer Symposium, Health Care Disparities Category

2008, Connect Care Surgery “Future Direction” Award

2008, Alpha Omega Alpha (AΩA) Medical Honor Society

2006, Samuel A. Wells, Jr. Resident Research Award Finalist

2006, 2008, Resident Teaching Award

2006, Young Investigator Award


Areas of Research Interest

I am a surgical oncologist and translational scientist who treats solid tumors, including pancreatic cancer, primary and metastatic liver cancers, gastric cancer, soft tissue sarcoma, and melanoma. My research training began at the University of Michigan under the mentorship of Drs. James Mulé and Alfred Chang in tumor immunology. These early studies of dendritic cell-based cancer vaccines set the stage for my interest in cancer biology and immunology.

Since that time, I have continued my research and clinical training in surgical oncology and solid tumor biology and immunology. I completed a Surgical Oncology Fellowship at Memorial Sloan-Kettering Cancer Center. I have >220 peer-reviewed publications with an emphasis on solid tumor biology, treatment, and outcomes. I am the Chief of Surgical Oncology and serve as Director of the Washington University Solid Tumor Tissue Bank and Registry. I am also the Co-Leader of the Solid Tumor Therapeutics Program (STTP) and the Melanoma and Cutaneous Oncology Program at Barnes-Jewish Hospital and the Alvin J. Siteman NCI-designated Comprehensive Cancer Center at Washington University School of Medicine in St. Louis, Missouri. My research focuses on two main areas: (1) mechanisms of cancer metastases and (2) novel in vitro and small animal models of cancer. We directly compare primary and metastatic solid tumors, leveraging our expertise and strength in high-quality biospecimen procurement. In conjunction with collaborators at The McDonnell Genome Institute at Washington University, we employ comparative genomic, transcriptomic, and epigenetic techniques to identify differences in mutational profiles between metastatic and primary tumor tissue. Pathways found to be critical in the acquisition of a metastatic phenotype are further explored. This has led to the creation of the multi-disciplinary “Team Science” Cancer Genomics working group, which fosters multi-PI projects and collaborations. In the area of cancer modeling, we are working to improve the pre-treatment evaluation of diagnostics and therapeutics by developing novel small animal and in vitro models of cancer. I am the PI of an NCI-R01 to develop a humanized mouse model of cancer to evaluate cancer biology and immunology and I am the PI of an NCI-R21 to develop a novel “tumor-on-a-chip” high-throughput, in vitro model system.

I am also Co-PI of the Washington University U2C Human Tumor Atlas Network (HTAN) program that is evaluating resistance and response to treatment across space and time in pancreatic and breast cancer. I have expertise and significant experience leading large-scale human tumor collection efforts. I serve as the PI of the Biospecimen Core of the Washington University SPORE in Pancreatic Cancer and am Co-PI of the PDX Development Unit for the Washington University PDX U54 Clinical Trial Program. As the director of the Solid Tumor Tissue Bank and Registry, I have overseen the collection of >2,000 human tumors and creation of >20,000 derivatives. We have an IRB-approved tumor collection and patient-derived xenografting (PDX), cell line, and organoid creation effort. We work in a multi-disciplinary, collaborative effort to evaluate and translate these model systems into tools that can be used to evaluate novel therapeutics in translational oncology.

I also have a strong commitment and interest in surgical and graduate medical education. I serve as Associate Program Director and Director of Resident Research for the General Surgery Residency Training Program at Barnes-Jewish Hospital at Washington University School of Medicine. I have mentored >15 undergraduates, medical students, residents, and fellows in my laboratory and research program, many whom have gone on to further training and careers in academic surgical oncology.



Hospital Affiliations

Barnes-Jewish Hospital

Barnes-Jewish West County Hospital

Siteman Cancer Center West County

Patients Seen At

Center for Advanced Medicine
4921 Parkview Place
Floor 12, Suite B
St. Louis, MO 63110

Barnes-Jewish West County Hospital
Siteman Cancer Center
10 Barnes West Drive
Medical Office Building 2
Creve Coeur, MO 63141

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