恶性疾病可以在红细胞表面一些异常抗原表达,导致“血型变异”。红细胞表面表达血型的抗原阴转或原来没有的阳转,都可以导致“血型变异”。临床上比较常见的是由白血病化疗导致红细胞ABO血型抗原减弱而致血型变异,而骨髓增生异常综合征引起的情况罕见。本例患者经多次住院治疗? Malignant diseases can be some abnormal antigen expression on the surface of red blood cells, leading to “blood group variation.” Erythrocyte surface expression of blood type antigens or non-original yin, can lead to “blood type variation.” Clinically, the more common cause of leukemia chemotherapy led to the reduction of red blood cells ABO blood group antigen-induced variation, and myelodysplastic syndrome caused by rare cases. In this case after multiple hospitalizations?