Kristen M. Stashek, MD

Assistant Professor of Clinical Pathology and Laboratory Medicine
University of Pennsylvania Perelman School of Medicine

Contact InformationHospital of the University of Pennsylvania
3400 Spruce St
6 Founders
Philadelphia, PA 19104

Specialty Division

Anatomic Pathology

Research Expertise

Neuroendocrine neoplasia of the gastrointestinal tract and pancreas

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 (Medicine), UMDNJ-Robert Wood Johnson Medical School, 2008

Postgraduate Training

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

Awards and Honors

RWJMS Summer Research Grant, 2005
UVA Young Scientist Research Grant ($500), 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, 2017 - Present

Selected Publications

Mismatch Repair Deficiency (MMR-D) and Programmed Death Ligand-1 (PD-L1) Expression in Gastric Adenocarcinomas

Taylor M Jenkins, Rashmi Tondon, Li-Ping Wang, Amy Ziober, Priti Lal, Stuti G Shroff, Emma E Furth, Kristen M Stashek, Modern Pathology Volume 30, (S2): 178A, 2017

Molecular and Cytogenomic Profiling of Hepatic Adenocarcinoma Expressing Inhibin, a Mimicker of Neuroendocrine Tumors: Proposal to Reclassify as "Cholangioblastic Variant of Intrahepatic Cholangiocarcinoma".

Braxton DR, Saxe D, Damjanov N, Stashek K, Shroff S, Morrissette JD, Tondon R, Furth EE., Human Pathol, 2017

Deep Inflammation in Clinically Diagnosed Ulcerative Colitis (UC) Resections: How Much Is Too Much?

Sharon Song, Stuti G Shroff, Emma E Furth, Rashmi Tondon, Kristen M Stashek., Modern Pathology 30(S2): 201A, 2017

Embolotherapy for Neuroendocrine Tumor Liver Metastases: Prognostic Factors for Hepatic Progression-Free Survival and Overall Survival.

Chen JX, Rose S, White SB, El-Haddad G, Fidelman N, Yarmohammadi H, Hwang W, Sze DY, Kothary N, Stashek K, Wileyto EP, Salem R, Metz DC, Soulen MC, Cardiovasc Intervent Radiol 40(1): 69-80, 2017

Yttrium-90 Microspheres as a cause of non-healing gastric ulcer: histologic features often mimic chemical gastropathy

Jenkins TM, Shroff SG, Tondon R, Furth EE, Stashek KM, Modern Pathology 29(S2): 176-177A, 2016

Ipilumimab induced perforating colitis: severe cases mimic Crohn disease and ulcerative colitis

Tondon R, Furth EE, Shroff S, Stashek K, Modern Pathology 29(S2): 203A, 2016

The Notch pathway is activated in neoplastic progression in esophageal squamous cell carcinoma

Lubin DJ, Shroff SG, Stashek KM, Furth EE, Modern Pathology 29(S2): 184A, 2016

Neoplasia in Patients with Atrophic Metaplastic Autoimmune Gastritis (AMAG): Screening and Surveillance Endoscopy Should Become Standard of Care.

Stashek, Kristen; Tondon, Rashmi; Shroff, Stuti G.; Roses, Robert; Furth, Emma E.; Metz, David C., Digestive Diseases Week 2016, Poster presentation, San Diego, CA, 2016

Leong's Manual of Diagnostic Antibodies for Immunohistology

Stashek KM, Shroff SG, Cambridge University Press 3rd Edition, 2016

Clinical and Pathologic Characteristics of Gastric Neuroendocrine Tumors in a Tertiary Care Center

Stashek K, Roses R, Furth E, Metz D, North American Neuroendocrine Tumor Society Meeting, 2015