The present invention relates to methods of using drugs, e.g. antibodies such as e.g. anti-C5 antibodies, that are capable of inhibiting the complement pathway for treating Transplant Associated Microangiopathy, in particular after hematopoietic cell transplantation.本發明係關於利用藥物,例如諸如抗C5抗體之抗體,其能夠抑制補體路徑以治療移植相關微血管病,詳言之造血細胞移植後之移植相關微血管病的方法。