Suntrea Hammer, M.D. is an Associate Professor of Pathology at the University of Texas Southwestern Medical Center and the Director of Gastrointestinal and Liver Pathology. 

Dr. Hammer received her Doctor of Medicine degree from the University of Michigan in Ann Arbor, Michigan. She completed additional training in Anatomic and Clinical Pathology, as well as focused fellowship training in general surgical pathology and gastrointestinal and liver pathology at the University of Michigan. Her practice focuses on neoplastic and inflammatory pathology with an emphasis on the liver and the gastrointestinal tract. 

Dr. Hammer is actively involved in the pathology community both locally and nationally. She currently serves as the Vice President of the Texas Society of Pathologists with a focus on the engagement of trainees and new in practice pathologists. She also volunteers significant time with the United States and Canadian Academy of Pathology, the American Society of Clinical Pathology, and the United States Gastrointestinal Pathology Society. Dr. Hammer also educates other on the field of pathology, serving as the faculty advisor for the Student Pathology Interest Group, the Director of the Bain fellowship in Pathology, and the course director for the surgical pathology rotations for second and fourth year medical students.

Dr. Hammer’s research interests are heavily focused on gastroesophageal adenocarcinoma, quality improvement, and the effects of neoadjuvant therapy in gastrointestinal and pancreatobiliary carcinomas.


Medical School
University of Michigan Medical School (2007)
University of Michigan Health System (2011), Anatomic & Clinical Pathology
University of Michigan Health System (2012), Surgical Pathology
University of Michigan Health System (2013), Gastroenterology & Liver Diseases

Research Interest

  • Anal neoplasia
  • Gastroesophageal neoplasia
  • Hepatobiliary disease
  • Inflammatory gastrointestinal disorders
  • Neuroendocrine tumors
  • Pancreatic diseases
  • Quality Assurance/Quality Improvement


Featured Publications LegendFeatured Publications

Clinical and Histopathologic Features Can Help Target Immunohistochemical Stain Use in the Diagnosis of Viral Esophagitis.
Desai N, Albahra S, Lucas E, Singal AG, Hammer STG, Gopal P, Appl Immunohistochem Mol Morphol 2021 Aug
Metastases can occur in cirrhotic livers with patent portal veins.
Mahdi Z, Ettel MG, Gonzalez RS, Hart J, Alpert L, Fang J, Liu N, Hammer ST, Panarelli N, Cheng J, Greenson JK, Swanson PE, Westerhoff M, Diagn Pathol 2021 Feb 16 1 18
Reproducibility of AJCC Criteria for Classifying Deeply Invasive Colon Cancers Is Suboptimal for Consistent Cancer Staging.
Panarelli NC, Hammer STG, Lin J, Gopal P, Nalbantoglu I, Zhou L, Cheng J, Gersten AJ, McHugh JB, Parkash V, Lucas E, Westerhoff M, Am J Surg Pathol 2020 10 44 10 1381-1388
Hispanic/Latino Patients with Gastric Adenocarcinoma Have Distinct Molecular Profiles Including a High Rate of Germline CDH1 Variants.
Wang SC, Yeu Y, Hammer STG, Xiao S, Zhu M, Hong C, Clemenceau JR, Yoon LY, Nassour I, Shen J, Agarwal D, Reznik SI, Mansour JC, Yopp AC, Zhu H, Hwang TH, Porembka MR, Cancer Res 2020 06 80 11 2114-2124
When Phenotype Does Not Match Genotype-The Importance of Returning to the Raw Data.
Wachsmann MB, Verma UN, Arriaga YE, Hammer ST, Oliver D, J Appl Lab Med 2019 11 4 3 446-450
Assessment of circularized E7 RNA, GLUT1, and PD-L1 in anal squamous cell carcinoma.
Chamseddin BH, Lee EE, Kim J, Zhan X, Yang R, Murphy KM, Lewis C, Hosler GA, Hammer ST, Wang RC, Oncotarget 2019 Oct 10 57 5958-5969
Lymphocytic esophagitis: an update on histologic diagnosis, endoscopic findings, and natural history.
Patil DT, Hammer S, Langer R, Yantiss RK Ann. N. Y. Acad. Sci. 2018 Dec 1434 1 185-191
Novel Application of Extracorporeal Photopheresis as Treatment of Graft-versus-Host Disease Following Liver Transplantation.
Brown TJ, Gentry C, Hammer ST, Hwang CS, Vusirikala M, Patel PA, Matevosyan K, Tujios SR, Mufti AR, Collins RH ACG Case Rep J 2017 4 e48
Esterase-activatable ?-lapachone prodrug micelles for NQO1-targeted lung cancer therapy.
Ma X, Huang X, Moore Z, Huang G, Kilgore JA, Wang Y, Hammer S, Williams NS, Boothman DA, Gao J J Control Release 2015 Feb 200C 201-211
Beyond acute appendicitis: imaging and pathologic spectrum of appendiceal pathology.
Gaetke-Udager K, Maturen KE, Hammer SG Emerg Radiol 2014 Oct 21 5 535-42


Featured Books Legend Featured Books

Professional Associations/Affiliations

  • American Gastroenterological Association (2011)
  • American Society of Clinical Oncology (2021)
  • American Society of Clinical Pathologists (2007)
  • College of American Pathologists (2007)
  • Gastrointestinal Pathology Society (2013)
  • Pancreatobiliary Society (2014)
  • Texas Cancer Registry (2021)
  • Texas Society of Pathologists (2014)
  • United States and Canadian Academy of Pathology (2007)