Panagiotis Baliakas, MD, PhD, from Uppsala University, Uppsala, Sweden, presents the results from a multi-institutional study conducted at the European research organization, ERIC, evaluating the cytogenetic complexities in chronic lymphocytic leukemia across 3,500 patients and how they are associated with clinical outcome and overall survival. This video was recorded at the International Workshop on Chronic Lymphocytic Leukemia (iwCLL) 2017 in New York, NY.