Chronic lymphocytic leukemia (CLL) is a type of cancer that starts from white blood cells (called lymphocytes) in the bone marrow. CLL mainly affects older adults, and accounts for about one-third of all leukemias.
Whether you’re worried about developing chronic lymphocytic leukemia, making decisions about treatment, or trying to stay well after treatment, we can help. Find detailed information in our Detailed Guide, or get a shorter, simpler version in our Overview Guide.
Learn about the causes of chronic lymphocytic leukemia and what you might be able to do to help lower your risk.
If you are facing chronic lymphocytic leukemia, we can help you learn about your treatment options and possible side effects, and point you to information and services to help you get through treatment and live well afterward.
The American Cancer Society is committed to relentlessly pursuing the answers that will save lives from leukemia. In fact, the Society has been a part of nearly every major cancer research breakthrough in recent history.
Facing leukemia? Connect with patients, survivors, and caregivers through the American Cancer Society's online community, Cancer Survivors Network.
Read the latest developments in chronic lymphocytic leukemia.