The 2025 European Hematology Association (EHA) Annual Meeting was grandly held both online and in person, gathering top experts and cutting-edge research from the global hematology community. At this conference, a revolutionary study on the origin of Chronic Lymphocytic Leukemia (CLL) attracted widespread attention. A research team from Spain, using multi-omics single-cell sequencing technologies, revealed that CLL does not, as traditionally believed, originate from a single clone. Instead, in some patients, multiple independent minor clones with the biological characteristics of CLL exist, having emerged and begun to evolve decades before the disease is diagnosed. This discovery not only profoundly reshapes our understanding of CLL pathogenesis but also provides a completely new theoretical basis for future early diagnosis and intervention strategies.