骨髓增生异常综合征（MDS）是骨髓造血干细胞克隆性疾病。一般认为多见于40岁以上成人，儿童少见。近年来，有关儿童MDS的报道陆续有所增加，但多分布于年长儿童，对于3岁以下婴幼儿的报道及研究仍较少。本文对我院自1987年9月～1996年9月九年间诊治的12例册幼儿MDS的临床资料? Myelodysplastic syndrome (MDS) is a hematopoietic stem cell clonal disease. Generally believed that more common in adults over the age of 40, rare in children. In recent years, reports on MDS in children have been gradually increasing, but many are distributed among older children, and there are still few reports and studies on infants under 3 years of age. This article on our hospital from September 1987 to September 1996 nine years of diagnosis and treatment of 12 cases of young children with MDS clinical data?