Chronic lymphocytic leukemia (CLL) is a form of cancer of the blood and bone marrow, the spongy tissue inside bones where blood cells are made. CLL happens when a person’s bone marrow makes too many lymphocytes, a type of white blood cell. According to the National Cancer Institute, when CLL metastasizes (spreads), it usually travels from the…
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Understanding Chronic Lymphocytic Leukemia of the Brain





