Leukemias
Leukemias are various cancers of the bodyıs blood forming tissues, including the bone marrow and lymph system. Leukemia forms when the maturation of white cells in the bone marrow takes a wrong path and abnormal or cancerous white cells are produced instead. During this process, chromosomal rearrangements occur and the cancerous cells multiply without limit, finally replacing the cells that usually produce normal white cells in the bone marrow, lymph system, and bloodstream. Leukemias may then metastasize, rapidly invading the liver, spleen, kidneys, lymph nodes, or brain. Leukemias occur somewhat more frequently in men than in women.

Multiple Myeloma
Multiple myeloma is a disorder of the plasma cells (healthy plasma cells develop in bone marrow from a type of white blood cell and are responsible for producing antibodies in the blood, which in turn protect the body against infections). Multiple myeloma occurs when a group of abnormal plasma cells multiply and cause tumors in the bone marrow. As a result of this cell multiplication, a large number of abnormal antibodies will accumulate in the blood or urine. At that point, the production of normal antibodies is decreased and the body becomes vulnerable to infections. Multiple myeloma affects women and men equally and it represents 1 percent of all cancers in the United States.