Concept of leukemia Definition It is the results of the tumor proliferation of heamotopoietic stem cells.（造血干细胞） Leukemia is a malignant blood disorder. (not solid tumor)
DIAGNOSIS AND CLASSIFICATION Anemia is an absolute decrease in hematocrit , hemoglobin concentration, or the RBC count. Anemia is not a diagnosis, but a sign of underlying disease
Bone marrow hematopoiesis failure led by chemicals, radiation, biological factors and unknown etiology. The common clinical presentation is mild to severe pancytopenia
