Marcus Messmer, MD

Clinical Locations
Primary Location
Fox Chase Cancer Center
333 Cottman Avenue
Philadelphia, PA 19111
Assistant Professor, Department of Hematology/Oncology
Specialties
Treatment Philosophy
A cancer diagnosis can be an overwhelming and life-altering event. I am honored to have the privilege of guiding patients and their families through each step of their care. The rapid pace of oncology research has led to the introduction of many novel and targeted therapies, and I take a collaborative approach to personalizing these treatment options for my patients. I am excited to join a comprehensive and multidisciplinary team at Fox Chase that can support patients and families through their treatment and recovery.
Educational Background
- 2018-2021 - Fellow, Medical Oncology, Johns Hopkins University, Baltimore, MD
- 2014-2017 - Resident, Internal Medicine, Osler Medical Housestaff Training Program, Johns Hopkins, Baltimore, MD
- 2014-2015 - Intern, Internal Medicine, Osler Medical Housestaff Training Program, Johns Hopkins, Baltimore, MD
- 2014 - MD, Johns Hopkins University School of Medicine, Baltimore, MD
- 2009 - Post-Baccalaureate, Premedical Program, Johns Hopkins University, Baltimore, MD
- 2005 - BS, Mathematics, BA, Philosophy, Indiana University, Bloomington, IN, High Distinction with Honors
Certifications
- 2017-Present - American Board of Internal Medicine, Internal Medicine
- 2020-Present - American Board of Internal Medicine, Medical Oncology
Memberships
- 2018-Present - American Society of Clinical Oncology, Member in Training
Honors & Awards
- 2020 - Merit Award, ASCO Annual Meeting
- 2014 - Alpha Omega Alpha Honor Society, Johns Hopkins School of Medicine
- 2005 - Betty Neal Hamilton Award, Department of Philosophy, Indiana University
- 2005 - Phi Beta Kappa Honor Society, Indiana University
- 2004 - Wilcox Scholarship, Department of Mathematics, Indiana University
- 2003 - Hennel Memorial Scholarship, Department of Mathematics, Indiana University
- 2001-2005 - Honors College Scholarship, Indiana University
Research Interests
- Developed and authored a multicenter phase II trial investigating venetoclax and rituximab as fist line treatment of mantle cell lymphoma in patient ineligible for aggressive therapy
- Investigated incidence, clinical characteristics, outcomes, and response to treatment of patients with large granular lymphocytosis after allogenic blood or marrow transplantation
- Developed database of patients with cutaneous T cell lymphoma to investigate risk of second malignancies and possible genetic predisposition
Selected Publications
Messmer M, Wake L, Tsai HL, Jones RJ, Varadhan R, Wagner-Johnston N. Large Granular Lymphocytosis With Cytopenias After Allogeneic Blood or Marrow Transplantation: Clinical Characteristics and Response to Immunosuppressive Therapy. Transplant Cell Ther. 2021 Mar;27(3):260.e1-260.e6. doi: 10.1016/j.jtct.2020.12.008. Epub 2020 Dec 16. PMID: 33781530
Messmer M, Tsai HL, Varadhan R, Swinnen LJ, Jones RJ, Ambinder RF, Shanbhag SP, Borowitz MJ, Wagner-Johnston N. R-CHOP without radiation in frontline management of primary mediastinal B-cell lymphoma. Leuk Lymphoma. 2019 May;60(5):1261-1265. doi: 10.1080/10428194.2018.1519812. Epub 2019 Jan 18. PMID: 30656983; PMCID: PMC6472975
Additional Publications

Clinical Locations
Primary Location
Fox Chase Cancer Center
333 Cottman Avenue
Philadelphia, PA 19111
Treatment Philosophy
A cancer diagnosis can be an overwhelming and life-altering event. I am honored to have the privilege of guiding patients and their families through each step of their care. The rapid pace of oncology research has led to the introduction of many novel and targeted therapies, and I take a collaborative approach to personalizing these treatment options for my patients. I am excited to join a comprehensive and multidisciplinary team at Fox Chase that can support patients and families through their treatment and recovery.
Education
Educational Background
- 2018-2021 - Fellow, Medical Oncology, Johns Hopkins University, Baltimore, MD
- 2014-2017 - Resident, Internal Medicine, Osler Medical Housestaff Training Program, Johns Hopkins, Baltimore, MD
- 2014-2015 - Intern, Internal Medicine, Osler Medical Housestaff Training Program, Johns Hopkins, Baltimore, MD
- 2014 - MD, Johns Hopkins University School of Medicine, Baltimore, MD
- 2009 - Post-Baccalaureate, Premedical Program, Johns Hopkins University, Baltimore, MD
- 2005 - BS, Mathematics, BA, Philosophy, Indiana University, Bloomington, IN, High Distinction with Honors
Certifications
- 2017-Present - American Board of Internal Medicine, Internal Medicine
- 2020-Present - American Board of Internal Medicine, Medical Oncology
Memberships
- 2018-Present - American Society of Clinical Oncology, Member in Training
Honors & Awards
- 2020 - Merit Award, ASCO Annual Meeting
- 2014 - Alpha Omega Alpha Honor Society, Johns Hopkins School of Medicine
- 2005 - Betty Neal Hamilton Award, Department of Philosophy, Indiana University
- 2005 - Phi Beta Kappa Honor Society, Indiana University
- 2004 - Wilcox Scholarship, Department of Mathematics, Indiana University
- 2003 - Hennel Memorial Scholarship, Department of Mathematics, Indiana University
- 2001-2005 - Honors College Scholarship, Indiana University
Research Profile
Research Interests
- Developed and authored a multicenter phase II trial investigating venetoclax and rituximab as fist line treatment of mantle cell lymphoma in patient ineligible for aggressive therapy
- Investigated incidence, clinical characteristics, outcomes, and response to treatment of patients with large granular lymphocytosis after allogenic blood or marrow transplantation
- Developed database of patients with cutaneous T cell lymphoma to investigate risk of second malignancies and possible genetic predisposition
Publications
Selected Publications
Messmer M, Wake L, Tsai HL, Jones RJ, Varadhan R, Wagner-Johnston N. Large Granular Lymphocytosis With Cytopenias After Allogeneic Blood or Marrow Transplantation: Clinical Characteristics and Response to Immunosuppressive Therapy. Transplant Cell Ther. 2021 Mar;27(3):260.e1-260.e6. doi: 10.1016/j.jtct.2020.12.008. Epub 2020 Dec 16. PMID: 33781530
Messmer M, Tsai HL, Varadhan R, Swinnen LJ, Jones RJ, Ambinder RF, Shanbhag SP, Borowitz MJ, Wagner-Johnston N. R-CHOP without radiation in frontline management of primary mediastinal B-cell lymphoma. Leuk Lymphoma. 2019 May;60(5):1261-1265. doi: 10.1080/10428194.2018.1519812. Epub 2019 Jan 18. PMID: 30656983; PMCID: PMC6472975