Kristen M. Stashek, MD

Associate Professor of Clinical Pathology and Laboratory Medicine
Perelman School of Medicine at the University of Pennsylvania

Contact InformationHospital of the University of Pennsylvania
3400 Spruce Street, 7 Gates
Philadelphia, PA 19104

Specialty Division

Anatomic Pathology

Research Expertise

Inflammatory and neoplastic disorders of the gastrointestinal tract

Clinical Expertise

Gastrointestinal pathology with a special interest in gastrointestinal and pancreatic neuroendocrine tumors and inflammatory disorders of the gastrointestinal tract.


BS (Biology)   Georgian Court University, 2004

MD  UMDNJ-Robert Wood Johnson Medical School, 2008

Specialty Certification

Anatomic Pathology, American Board of Pathology, 2012

Postgraduate Training

Anatomic and Clinical Pathology Residency, University of Virginia Charlottesville, 2008-2012
Surgical Pathology Fellowship, University of Iowa Hospitals and Clinics, 2012-2013

Awards and Honors

RWJMS Summer Research Grant, 2005
UVA Young Scientist Research Grant, 2009
Best Podium Presentation, UVA Research Day, 2011
Best basic science talk, awarded at American Academy of Endocrine Surgeons meeting, 2014
The James E. Wheeler, MD Award for Excellence in Anatomic Pathology Resident Training Award, 2015
Most Outstanding Teacher in the Gastroenterology course, Penn Medical School (from class of 2019), 2016

Memberships and Professional Organizations

United States and Canadian Academy of Pathology, 2012 – Present
North American Neuroendocrine Tumor Society (NANETs), 2015 – Present
Rodger C. Haggitt Gastrointestinal Pathology Society, 2016 – Present
American Society for Clinical Pathology, ASCP RISE Surgical Pathology Subcommittee, 2017 - Present

Selected Publications

Histologic Inflammation can Predict Future Clinical Relapse in Ulcerative Colitis Patients in Endoscopic Remission

George LA, Feldman HT, Alizadeh M, Abutaleb A, Zullow S, Hine A, Stashek K, Sarkar S, Sun K, Hudesman D, Axelrad J, Cross RK., Crohns Colitis 360 5(4): , 2023, PMID:37886705

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Surgical Management of Germline Gastrointestinal Stromal Tumor

Kwak HV, Tardy KJ, Allbee A, Stashek K, DeMatteo RP., Ann Surg Oncol, 2023, PMID:37115371

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Gastrointestinal Tract Injury by Yttrium-90 Appears Largely Restricted to Resin Microspheres But Can Occur Years After Embolization

Feely, Michael DO; Tondon, Rashmi MD; Gubbiotti, Maria MD, PhD; Stashek, Kristen M. MD; Numbere, Numbereye MBBS; Huber, Aaron R. DO; Sharma, Ashwani K. MD; Geller, Brian S. MD; Salaria, Safia N. MD; Gonzalez, Raul S. MD, American Journal of Surgical Pathology 46(9): 1234-1240, 2022

Ghost Cell Odontogenic Carcinoma Arising in a Previous Calcifying Odontogenic Cyst: A Case Report and Review of Literature

Ioana Ghita, Michael Y. Nagai, Joshua E. Lubek, Kristen M. Stashek, John R. Basile, Jeffery B. Price, John C. Papadimitriou, Donita Dyalram & Rania H. Younis, Head and Neck Pathology 16(3): 828-835, 2022

Characterization of Mycophenolate Mofetil Gastrointestinal Toxicity and Risk Factors for Severe Disease and Poor Prognosis.

Bhattacharya S, Stoleru G, Patel P, Abutaleb A, Stashek K, Cross R, Inflamm Bowel Dis 28(5): 811–814, 2022

Brown Bowel Syndrome: A Multi-Institutional Case Series.

1Arnold CA, Burke AP, Calomeni E, Mayer RC, Rishi A, Singhi AD, Stashek K, Voltaggio L, and Tondon R, American Journal of Surgical Pathology 44(6): 834-837, 2020

Epithelioid Sarcoma with Retained INI1 Expression

Song L, Stashek KM, Benyounes A, Davis DL, Mulligan ME, Ng VY, Kallen ME, Histopathology 78(3): 464-466, 2021

The Incidence of Neoplasia in Patients with Autoimmune Metaplastic Atrophic Gastritis: A Renewed Call for Surveillance

Mahmud, N, Stashek K, Katona B, Tondon R, Shroff S, Roses R, Furth E, Metz D, Annals of Gastroenterology 32(1): 2019, 2018