再生障碍性贫血(简称再障),是由多种原因引起骨髓造血功能衰竭,周围血表现全血细胞减少和淋巴细胞百分率相对增高的一组综合病征。根据我国资料,发病率约为1.87～2.1/10万,可见本病不少见。临床上能查出致病因素者称继发性再生障碍性贫血(简称继发性再障),以区分于原因未明的原发性 Aplastic anemia (referred to as aplastic anemia), is a combination of symptoms caused by a variety of causes of bone marrow hematopoietic failure, peripheral blood showed pancytopenia and lymphocyte percentage relative increase. According to our data, the incidence rate is about 1.87 ~ 2.1 / 10 million, we can see the disease is not uncommon. Clinically, pathogenic factors can be identified as secondary aplastic anemia (referred to as secondary aplastic anemia), to distinguish between unexplained primary