Chronic Lymphocytic Leukemia

Chronic Lymphocytic Leukemia (CLL) is a type of blood cancer that affects white blood cells called lymphocytes. It usually develops slowly over a long period of time and may not show any signs or symptoms for years. CLL is the most common type of leukemia in adults and can affect the bone marrow, blood, lymph nodes, and other organs. This page provides an overview of CLL, including its symptoms, causes, diagnosis, treatment, and outlook for people with this condition.