Chronic Lymphocytic Leukemia (CLL)

Chronic lymphocytic leukemia (CLL) is one of the most commonly diagnosed forms of leukemia in the United States.1

  • CLL is generally incurable, and usually follows an indolent course2,3
  • CLL accounted for an estimated 20,110 diagnoses and 4660 deaths in 20174
  • CLL is most frequently diagnosed among people aged 65-74, with a median age of diagnosis of 70 years4
  • Many patients with CLL have at least one coexisting medical condition5


  1. Siegel RL, Miller KD, Jemal A. Cancer statistics, 2015. CA Cancer J Clin. 2015;65:5-29.
  2. Brenner H, Gondos A, Pulte D. Trends in long-term survival of patients with chronic lymphocytic leukemia from the 1980s to the early 21st century. Blood. 2008;111:4916-4921.
  3. Pileri SA, Ascani S, Sabattini E, et al. The pathologist’s view point. Part I – indolent lymphomas. Haematologica. 2000;85:1295-1307.
  4. SEER Stat Fact Sheets: Chronic Lymphocytic Leukemia (CLL). Bethesda, MD: National Cancer Institute. Updated 2017. Accessed August 23, 2017.
  5. Thurmes P, Call T, Slager S, et al. Comorbid conditions and survival in unselected, newly diagnosed patients with chronic lymphocytic leukemia. Leuk Lymphoma. 2008;49:49-56.