Flatiron Health Announces Research to Be Presented at the 2025 American Society of Hematology’s Annual Meeting & Exposition

• From CAR T delivery to measurable residual disease testing patterns: Flatiron's research at ASH 2025 and data solutions address critical gaps in blood cancer evidence worldwide

NEW YORK--(BUSINESS WIRE)--Flatiron Health today announced its presence at the 67th American Society of Hematology (ASH) Annual Meeting and Exposition happening from December 6-9, 2025, in Orlando, Florida. Flatiron's real-world data and research capabilities are featured across multiple presentations, including 12 research acceptances spanning hematologic malignancies—from CAR T cell therapy delivery and outcomes to measurable residual disease (MRD) testing patterns and treatment equity across blood cancers.

Flatiron’s presence at ASH 2025 closely follows their announcement of six new hematology Panoramic datasets, including five B-cell lymphomas and multiple myeloma, which draw from over 505,000 relevant longitudinal patient records in Flatiron’s network. The datasets represent a six-fold increase in cohort sizes when compared to the company’s previously available datasets and lay the evidence foundation that will guide better treatment decisions, accelerate new development, and ultimately improve outcomes for patients with blood cancers.

"The rapid advancements in the treatment of hematologic malignancies have required an incredibly thoughtful approach to research, one that captures the clinical nuance of disease subtypes, rare patient cohorts, novel endpoints, and evolving biomarkers at scale," said Emily Castellanos, MD, MPH, Senior Medical Director and Head of Research Oncology at Flatiron Health. "Our presence at ASH unlocks answers to questions that are shaping hematology care right now and our six newly launched hematology Panoramic datasets represent a clinical breakthrough, enabling researchers to study the real-world complexity of blood cancer care—from MRD testing patterns to CAR T therapy utilization—with a level of depth and rigor that was previously impossible.”

Research highlights include:

• Research examining real-world CAR T cell therapy delivery patterns across US oncology practices, including analysis of cytokine release syndrome, immune effector cell-associated neurotoxicity syndrome, and healthcare burden—addressing critical gaps in understanding how this transformative therapy is implemented across care settings.
• Multiple studies evaluating measurable residual disease testing patterns and their association with clinical outcomes in Philadelphia-negative B-cell acute lymphoblastic leukemia and multiple myeloma, providing insights into the real-world impact of this precision monitoring approach.
• EHR-derived datasets from Germany and the United Kingdom providing comprehensive analysis of diffuse large B-cell lymphoma and multiple myeloma management, demonstrating Flatiron's ability to generate high-quality, multinational real-world evidence.

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Abstracts and Poster Presentations

Use and Outcomes Following Blinatumomab Rechallenge in Adolescents and Young Adults (AYA) and Adults with B-Cell Acute Lymphoblastic Leukemia (B-ALL)
Michaela Liedtke, Nikesh N. Shah, Jessica T. Leonard, Anthony Proli, Yazan K. Barqawi, Hui-Han Chen, Alan Yong, Vikram Shetty, Elias Jabbour, Mark B. Geyer
Author Affiliations: Stanford Cancer Institute, Tampa General Hospital Cancer Institute, Knight Cancer Institute, AstraZeneca, MD Anderson Cancer Center, Memorial Sloan Kettering Cancer Center, Flatiron Health
Session Name: 612. Acute Lymphoblastic Leukemias: Clinical and Epidemiological: Poster I
Publication Number: 1555
Poster Session Date/Time: December 6, 2025, 5:30 PM - 7:30 PM

What Remains Matters: Real-World Impact of Measurable Residual Disease Testing in Multiple Myeloma
Ahmed Sawas, Farhad Khan, Jingru Wang, Evan Vietorisz, Yulia Kuznetsova, Amy Pierre, Siobhan Halloran
Session Name: 907. Outcomes Research: Plasma Cell Disorders: Poster I
Publication Number: 2789
Poster Session Date/Time: December 6, 2025, 5:30 PM - 7:30 PM

Biallelic TP53 Alterations Predict Poorer Survival in Mantle Cell Lymphoma: Insights from a National Real-World Cohort
Patrick Bliven, Xiaoyan Wang, Morgan Lael, Anosheh Afghahi, Mayur Narkhede
University of Alabama Birmingham, Flatiron Health
Session Name: 623. Mantle Cell, Follicular, Waldenstrom's, and Other Indolent B Cell Lymphomas: Clinical and Epidemiological: Poster I
Publication Number: 1830
Poster Session Date/Time: December 6, 2025, 5:30 PM - 7:30 PM

Mediators of Racial and Ethnic Inequities in Access to Front-Line Therapies for Chronic Lymphocytic Leukemia in the United States: A Real-World Evidence Study
Joanna M. Rhodes, Adam S. Kittai, Paul J. Hampel, Xiaoliang Wang, Qianhong Fu, Danni Zhao, Smriti Karwa, Olive Mbah, Ahmed Sawas, Benji Wagner, Rachel Myers, Derrick van Beuge, Gregory A. Maglinte, Erlene K. Seymour, Jacqueline C. Barrientos
Author Affiliations: Rutgers Cancer Institute, Icahn School of Medicine at Mount Sinai, Mayo Clinic, BeOne Medicines, Mount Sinai Comprehensive Cancer Center, Flatiron Health
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster I
Publication Number: 2720
Poster Session Date/Time: December 6, 2025, 5:30 PM - 7:30 PM

Real-World Insights into Diffuse Large B-Cell Lymphoma from EHR-Derived Data in Germany and the United Kingdom
Christoph Buhl, Ahmed Sawas, Arun Sujenthiran, Mohamed S Ali, Blythe Adamson
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster II
Publication Number: 4487
Poster Session Date/Time: December 7, 2025, 6:00 PM - 8:00 PM

Real-World Measurable Residual Disease (MRD) Testing Patterns and Associated Outcomes in Patients with Philadelphia-Negative B-Cell Acute Lymphoblastic Leukemia
Anthony Proli, Jason Sharpe, Jingru Wang, Jenna Collins, Ahmed Sawas
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster II
Publication Number: 4484
Poster Session Date/Time: December 7, 2025, 6:00 PM - 8:00 PM

Real-World Treatment Patterns and Survival Outcomes in Second and Third Line Settings in Large B-Cell Lymphoma (LBCL)
Joseph P. McGuirk, Miguel-Angel Perales, Mark R. Fesen, Jeremy Snider, Matt Bye, Anthony J. Proli, Blythe Adamson, Samuel Hong, Babatunde Adedokun, Hil Hsu
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster II
Publication Number: 4503
Poster Session Date/Time: December 7, 2025, 6:00 PM - 8:00 PM

Real-World Treatment Patterns and Clinical Outcomes in High-Risk Mantle Cell Lymphoma: A Retrospective Analysis
Preetesh Jain, Anna Teschemaker, Essam Ibrahim, Taavy Miller, Danni Zhao, Ayush Kris, Ahmed Sawas, Debbie Adkins, Anouchka Chelles, Victoria Otero, Tycel Phillips
Author Affiliations: The University of Texas MD Anderson Cancer Center, AstraZeneca, City of Hope Comprehensive Cancer Center, Flatiron Health
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster II
Publication Number: 4482
Poster Session Date/Time: December 7, 2025, 6:00 PM - 8:00 PM

Beyond the Trial: Real-World CRS, ICANS, and Healthcare Burden of CAR T-Cell Therapy Across US Oncology Practices
Taiga Nishihori, Li Chen, Benjamin Wagner, Niquelle Wadé, Selina Radlein, Spencer Langerman, Trong Le, Ahmed Sawas, Christina Fullerton
Author Affiliations: Moffitt Cancer Center, Flatiron Health
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster III
Publication Number: 6263
Poster Session Date/Time: December 8, 2025, 6:00 PM - 8:00 PM

Barriers and Bridges: Real-World CAR T Delivery Across US Oncology Practices
Taiga Nishihori, Maneet Kaur, Spencer Langerman, Christina Fullerton, Ahmed Sawas
Author Affiliations: Moffitt Cancer Center, Flatiron Health
Session Name: 906. Outcomes Research: Lymphoid Malignancies Excluding Plasma Cell Disorders: Poster III
Publication Number: 6262
Poster Session Date/Time: December 8, 2025, 6:00 PM - 8:00 PM

Real-World Insights into Multiple Myeloma Management: An Analysis of EHR-Derived Data in the UK and Germany
Christoph Buhl, Harlan Pittell, Arun Sujenthiran, Ahmed Sawas, Golnessa Mojtahedi, Blythe Adamson
Online only

The Bispecific Blind Spot: Uncovering Real-World Inequities in Diffuse Large B-Cell Lymphoma, Follicular Lymphoma, and Multiple Myeloma Therapy Access
Gene G. Ho, Olive M. Mbah, Cleo A. Ryals, Amy E. Pierre
Online only