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

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

Immunohistochemical Pitfalls in Malignant Peritoneal Mesothelioma: A Case Report and Review for the General Pathologist

Stashek, K, Fanaroff R, Burke A, AJSP: Reviews and Reports 27(3): 94-97, 2022

Do Additional Histologic Features Improve Pattern Based Grading of Resected Adenocarcinomas of the Lung?

Fanaroff R, Stashek K, Burke A, USCAP Annual Meeting, New Orleans, LA, 2022

Common Pathologic Staging Errors in Treatment Naive Colonic Adenocarcinoma Resection Specimens Upon Subspecialist Review and Effects on Post Operative Management

Wheeler E, Helman S, Bafford A, Stashek K, USCAP Annual Meeting, New Orleans, LA, 2022

Pleomorphic Carcinoid: A Pitfall in Diagnosis on Small Biopsy Specimens

Hardy, Naomi MD; Jacobs, Jonathan MD; Staats, Paul MD† Burke, Allen MD; Stashek, Kristen MD; Malone, Laura MD, AJSP: Reviews and Reports 27(2): 69-72, 2022

Tumor Budding in Non-Treated, Node-Negative Colorectal Adenocarcinoma Resection Specimens: What is the Association with Isolated Tumor Cells?

Hardy N, LaRocque A, Fanaroff R, Burke A, Bafford A, Stashek K, USCAP Annual Meeting, New Orleans, LA, 2022

Differences in Ki67 Proliferation Index Between Peripheral and Central Small Cell Carcinomas of the Lung

Fanaroff R, Herring A, Stashek K, Burke A, USCAP 2022 Annual Meeting, New Orleans, LA, 2022

Clinical and Pathologic Features of Colorectal Adenocarcinomas in Patients Under 50 Years of Age Undergoing Resection

Hardy N, Shih P, Sundel M, Burke A, Bafford A, Stashek K, USCAP Annual Meeting, New Orleans, LA, 2022