Leukemia - Chronic Lymphocytic - CLL: Statistics

Approved by the Cancer.Net Editorial Board, 10/2017

ON THIS PAGE: You will find information about the number of people who are diagnosed with CLL each year. You will also read general information on surviving the disease. Remember, survival rates depend on several factors. Use the menu to see other pages.

CLL is the most common type of leukemia in adults, accounting for 37% of cases. This year, an estimated 20,940 people of all ages (12,990 men and 7,950 women) in the United States will be diagnosed with CLL. CLL is more common in older adults. The average age of people diagnosed with CLL is approximately 70. CLL is uncommon in people under age 40 and very rare in children.

It is estimated that 4,510 deaths (2,790 men and 1,720 women) from CLL will occur this year. The survival rate for people with CLL varies widely according to the stage of the disease (see Stages.)

The 5-year survival rate tells you what percent of people live at least 5 years after the cancer is found. Percent means how many out of 100. The 5-year survival rate for people with CLL is 83%. 

It is important to remember that statistics on the survival rates for people with CLL are an estimate. The estimate comes from annual data based on the number of people with this cancer in the United States. Also, experts measure the survival statistics every 5 years. So the estimate may not show the results of better diagnosis or treatment available for less than 5 years. People should talk with their doctor if they have any questions about this information. Learn more about understanding statistics.

Statistics adapted from the American Cancer Society's (ACS) publication, Cancer Facts and Figures 2018, and the ACS website.

The next section in this guide is Medical Illustrations. It offers drawings of body parts often affected by this disease. Use the menu to choose a different section to read in this guide.