骨髓增生异常综合征(MDS)是一组克隆增殖性疾病,按照1997年世界卫生组织分类包括难治性贫血不伴有环状铁粒幼细胞(RA),伴有环状铁粒幼细胞(RARS),难治性血细胞减少伴有多系病态造血(RCMD),难治性贫血伴有原始细胞过多(RAEB),5q综合征,及不能分类的(MDS-u)。MDS低危患者的治疗主 Myelodysplastic syndrome (MDS) is a group of clonal proliferative diseases that, according to the World Health Organization classification in 1997, include refractory anemia not associated with ring-shaped granule cells (RA), with ring-shaped granule cells RARS), refractory cytopenia with multi-line pathologic hematopoiesis (RCMD), refractory anemia with excess of primitive cells (RAEB), 5q syndrome, and MDS-u. MDS treatment of low-risk patients