Measurable residual disease‐driven treatment in first‐line chronic lymphocytic leukaemia

The therapeutic paradigm for patients suffering from chronic lymphocytic leukaemia continues to rapidly evolve. Fixed duration therapies continue to develop using novel-novel non-chemotherapeutic combinations. B-cell lymphoma 2 (BCL2) inhibitors in combination with either anti-CD20 antibody or Bruton tyrosine kinase inhibitors are able to achieve deep responses. Levels of attained 'negative' measurable residual disease (MRD, also known as minimal residual disease) have been shown to predict survival outcomes in a number of settings, including following immunochemotherapy and BCL2-combinations. This review will outline the current data supporting fixed duration treatment approaches, the use of MRD in clinical practice, alongside the challenges and possibilities for MRD utility in the future.