Interplay between Genetic Ancestry, Self-reported Race and Ethnicity, and Clinical Factors in Pediatric Acute Lymphoblastic Leukemia: A REDIAL Consortium Report
Year: 2026
Type: article
Study design: Observational Study
Abstract: BACKGROUND: Pediatric acute lymphoblastic leukemia (ALL) is the most common cancer in children, and its incidence and outcomes vary by race and ethnicity. METHODS: The Reducing Ethnic Disparities in Acute Leukemia (REDIAL) Consortium has assembled a cohort of patients <25 years at diagnosis to examine genetic and neighborhood-level factors influencing ALL. As the cohort is ongoing, for this report, we examined sociodemographic and cytogenetic factors that might be associated with ALL outcome disparities. RESULTS: Among 2,512 patients diagnosed between 2005 and 2020, we observed distinct patterns of genetic ancestry and residential characteristics across self-reported race and ethnicity. Latino children, who comprised 55.3% of the cohort, had a mean Amerindigenous ancestry proportion of 50.9%, whereas non-Latino White children exhibited a predominantly European ancestry (mean = 78%). Neighborhood-level analysis revealed significant socioeconomic and geographic differences by race/ethnicity, with Latino children more frequently residing in Latino enclaves or economically disadvantaged neighborhoods. Cytogenetic profiling of 551 patients showed that favorable subtypes (double trisomies and ETV6::RUNX1) predominated overall, but ETV6::RUNX1 was significantly less common in Latino than in non-Latino White children; conversely, CRLF2 overexpression and immunoglobulin heavy chain (IGH) rearrangements were more frequent among Latino children. CONCLUSIONS: This first REDIAL cohort analysis reveals how genetic ancestry and neighborhood-level factors jointly shape the distribution of ALL cytogenetic subtypes, advancing our understanding of contributors to disparities in ALL outcomes. IMPACT: This analysis offers insights into factors underlying disparities in ALL outcomes that may be targeted for mitigation, ultimately guiding more equitable approaches to risk stratification and intervention.
Authors: Pragati Kore, Jennifer M. Geris, Maria Leon-Camarena, Maria I. Castellanos, Olga A. Taylor, Veronica Garcia-Morales, Austin L. Brown, Pagna Sok, Jeremy M. Schraw, Van Huynh, Kathleen F. Ludwig, Laura J. Klesse, Sandi L. Pruitt, Amy E. Hughes, Kevin Tien, Kenneth M. Heym, Timothy Griffin, Rodrigo Erana, Juan Carlos Bernini, Maria M. Gramatges, Elizabeth G. Atkinson, Philip J. Lupo, Michael E. Scheurer, Karen R. Rabin
Institutions: Baylor College of Medicine, The University of Texas at Austin, University of California, San Francisco, Children's Hospital of Orange County, The University of Texas Southwestern Medical Center, Cook Children's Medical Center, Children's Hospital of San Antonio, Emory University, Children's Healthcare of Atlanta
Language: English
Field: Medicine
Domain: Health Sciences
Open Access status: green
Awards: The Adolescent and Childhood Cancer Epidemiology and Susceptibility Service (ACCESS) for Texas, The Adolescent and Childhood Cancer Epidemiology and Susceptibility Service (ACCESS) for Texas, Systems Epidemiology for Cancer Training Program (SECT Program), G7190381012, Improving Outcome Disparities for Latino Children and Adolescents with Acute Lymphoblastic Leukemia, Exploring the Biological Basis of Ethnic and Social Disparities in Pediatric Acute Lymphoblastic Leukemia Outcomes, G9000287437, Empowering gene discovery and accelerating clinical translation for admixed populations, Reducing Disparities in Acute Leukemia (REDIAL) Consortium , Genetics & Genomics Training Program, The Clinical Translational Research Certificate of Added Qualification Program
OpenAlex ID: W7129007843
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