Chronic lymphocytic leukemia (CLL) is due to tumor-like lymphocyte proliferation and its morphological characteristics of the mature lymphocytes in vivo accumulation in the blood and bone marrow lymphocytes increased, lymph nodes, liver, splenomegaly, finally involved other than the lymphatic system organizations, monoclonal of CLL cells were proliferating, more than 95% of slow leaching for B-cell-type, 3 - 5% for the T-cell type.
CLL lower incidence in China, only chronic leukemia 10 percent, Japan and India and China similar to a high incidence of Europe and the United States, accounting for chronic leukemia 50 percent or more, mostly elderly patients, aged over 50 accounted for 90 percent, male to female ratio was 2:1.
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