Myelodysplastic syndromes (MDS) are a family of disorders in which bone marrow fails to produce enough healthy blood cells. With MDS, some of the cells will have an abnormal shape, size or look. Most experts agree that MDS is a form of blood and bone marrow cancer. The exact number of people living with MDS is unknown. Studies suggest that 12,000 to 15,000 MDS cases are newly diagnosed annually in the U.S., and an estimated 50,000 to 75,000 people currently live with MDS.
