What is bone marrow disease?
The spongy stuff that is in the bones is called bone marrow. It is what produces the white, and red blood cells for the body as well as plasma that the body needs to keep healthy. If the bone marrow produces abnormal cells it is one of the causes of a bone marrow disease. There are many bone marrow diseases. For more information, look here: http://www.nlm.nih.gov/medlineplus/bonemarrowdiseases.
