High mortality in hematopoietic stem cell transplant-associated thrombotic microangiopathy with and without concomitant acute graft-versus-host disease.

Transplant-associated thrombotic microangiopathy (TA-TMA) remains a major complication of allogeneic hematopoietic stem cell transplantation (allo-HSCT). We hypothesized that TA-TMA correlates with steroid-refractory acute graft-vs.-host disease (aGvHD) and assessed 660 patients suffering from either AML n = 248, ALL n = 79, CML n = 23, CLL n = 36, lymphoma/myeloma n = 127, MDS/MPN n = 124 or bone marrow failure n = 22, who met the study inclusion criteria and had undergone myeloablative (78%) and non-myeloablative (22%) allo-HSCT between 2006 and 2016.