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Lymphoid leukemias (also called lymphocytic, lymphogenous, or lymphoblastic leukemias) are a group of leukemias affecting circulating lymphocytes, a type of white blood cells. The lymphocytic leukemias are closely related to lymphomas of the lymphocytes, to the point that some of them are unitary disease entities that can be called by either name (for example, adult T-cell leukemia/lymphoma). Such diseases are all lymphoproliferative disorders. Most lymphoid leukemias involve a particular subtype of lymphocytes, the B cells. ==Classification== Historically, they have been most commonly divided by the stage of maturation at which the clonal (neoplastic) lymphoid population stopped maturing: * Acute lymphoblastic leukemia * Chronic lymphocytic leukemia However, the influential WHO Classification (published in 2001) emphasized a greater emphasis on cell lineage. To this end, lymphoid leukemias can also be divided by the type of cells affected: * B-cell leukemia * T-cell leukemia * NK-cell leukemia The most common type of lymphoid leukemia is B-cell chronic lymphocytic leukemia. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「lymphoid leukemia」の詳細全文を読む スポンサード リンク
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