'Fast Facts: Follicular Lymphoma' provides an introduction to follicular lymphoma for healthcare professionals and others with an interest in this blood cancer. It summarizes what is known about the pathophysiology of the disease, and discusses the importance of accurate diagnosis, classification, and risk assessment, together with existing approaches to treatment and monitoring. Looking into the future, it also reviews some of the therapies in development, which may ultimately improve quality of life and ensure better outcomes for patients with FL.