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) 2021/2/23 xie Yi, Hua Shan Hospital2021/2/23 xie Yi,Hua Shan Hospital 2 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)