A related blood disorder, myelodysplastic syndromes, or MDS, occurs when the bone marrow begins producing poorly functioning or immature blood cells. About 20,000 to 30,000 new cases occur each year.

• 骨髓增生异常综合症（MDS）也是一种血液相关的疾病，是由于骨髓产生非成熟或无功能的血细胞。美国每年新发病例大约为20000-30000。