Distribution of <scp>ABO</scp> /Rh Blood Types Across Childhood Leukemia Subtypes: A Retrospective Cohort Study of 540 Pediatric Patients

In this cohort of pediatric leukemia patients, ABO/Rh blood types were not significantly associated with specific leukemia subtypes or survival outcomes. Because this study lacks a control group from the general population, it does not assess whether blood type influences the risk of developing leukemia; rather, it evaluates whether blood type is differentially distributed across leukemia subtypes among diagnosed cases. Our study contributes important evidence from a region with distinct blood type demographics and supports the need for future larger, multi-center studies to explore subtle associations in rare subtypes and blood groups.