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Hematologic neoplasms are tumors of blood cells. All the blood cells are derived from a pluripotent stem cell that can differentiate into various cell lineages, including erythrocyte, megakaryocyte, basophil, eosinophil, neutrophil, monocyte, and lymphocyte (Fig. 1). These cell lineages are grouped into lymphoid cells and nonlymphoid cells or myeloid cells. Therefore, leukemias can be divided into lymphoid leukemia and myeloid leukemia. Leukemic cells originate from the bone marrow and circulate in the peripheral blood, whereas lymphoma is lymphoid tumor confined to the lymphoid organs or extranodal tissues. However, with the advent of new technology, lymphoma cells can be detected in the blood and bone marrow even in a relatively early stage, and thus the demarcation between lymphoma and leukemia is sometimes blurred.

Keywords

Acute Myeloid Leukemia Chronic Lymphocytic Leukemia Acute Leukemia Mantle Cell Lymphoma Acute Myelogenous Leukemia 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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