骨髓增生异常综合征(myelodysplastic syndro-me,MDS)通常是指获得性血液病。原发性患者约有一半年龄在70岁以上,年龄低于40岁者约占10%。近来,年龄较轻的病者患 MDS 的人数有所增加。这些人多数是因患有恶性或非恶性疾病而使用细胞毒药物或同时进行放疗后发生的(继发性 MDS)。患者的 Myelodysplastic syndro-me (MDS) usually refers to acquired blood disease. About half of the primary patients are over 70 years of age and about 10% of those under 40 years of age. Recently, the number of people with MDS has increased in younger patients. Most of these people are those who develop cytotoxic drugs or radiotherapy (secondary MDS) as a result of having a malignant or non-malignant disease. Patient’s