The cellularity,number of megakarocytes and dysplastic hematopoiesis in bone maeeow are key differential in dexes between MDS-RA and CAA,and bone marrow biopsy may facilit-dte the measure of dysplastic hematopoiesis.

• 骨髓细胞学检查是骨髓增生异常综合征难治性贫血与慢性再生障碍性贫血鉴别的主要手段,骨髓病理学检查能提高病态造血的检出率,尤其是ALIP检测不仅为MDS-RA和CAA鉴别的主要指标,而且能够预测疾病的预后。