Three Times Spontaneous Remission of Severe Aplastic Anemia Following Granulocyte Transfusion from Related Donors: a Case Report and Literature Review

APLASTIC anemia(AA) is a bone marrow failure disease caused by abnormal activation of T lymphocytes,resulting in the apoptosis of hematopoietic cells and bone marrow failure.1 Currently,hematopoietic stem cell transplantation(HSCT),immunosuppressive therapy(IST),and supportive care(e.g.transfusion adjuvant therapy,hematopoietic growth