Chronic lymphocytic leukemia-- or CLL-- is a type of cancer that happens in your blood and bone marrow, the spongy tissue inside your bones. While the exact cause isn't known, doctors do know that ...

SLL, also a slow-growing cancer, affects the same type of cells as CLL but starts in lymphoid tissues such as the spleen instead of in the blood-forming cells. Statins are among the most widely ...

What Is Chronic Lymphocytic Leukemia? Chronic lymphocytic leukemia (CLL) is a cancer that affects a type of white blood cell called lymphocytes. Lymphocytes help your body fight infection.