University of Eastern Finland (UEF Viestintä) Nov 18 2025 Researchers at the University of Eastern Finland and their international collaborators have identified key developmental and molecular differences between the two main subtypes of chronic lymphocytic leukemia, CLL. The findings, published in PLOS ONE , show that mutated and unmutated forms of CLL may originate from distinct stages of B cell development, offering new insight into disease mechanisms and biomarker discovery. Mutated and