Bone marrow cancer is not leukemia, which are two different diseases. Bone marrow cancer refers to myeloma, a hematologic malignancy originating from bone marrow plasma cells, caused by malignant proliferation of bone marrow monoclonal plasma cells and secretion of large amounts of monoclonal immunoglobulin. The cause is unknown; ionizing radiation, viral infection, and genetic mutation may be associated with the development of myeloma. It can also occur on the basis of chronic osteomyelitis, pyelonephritis and other diseases. Leukemia is a type of malignant clonal disease of hematopoietic stem progenitor cells, in which normal hematopoiesis is inhibited and other organs and tissues are infiltrated due to the accumulation of a large number of leukemic cells. The etiology of the disease is not fully understood and may be related to biological factors, physical factors, chemical factors, genetic factors and other blood diseases. The main symptoms are anemia, bleeding and infection. Bone marrow cancer and leukemia can be cured by chemotherapy, they are two different diseases of blood system, and the medication is also different, it is recommended to standardize the treatment under the guidance of doctors.