Clinical Outcomes and Treatment Strategies of Adult Transplant-Associated Thrombotic Microangiopathy: External Validation of Harmonizing Definitions and High-Risk Criteria.

Transplant-associated thrombotic microangiopathy (TA-TMA) is an endothelial dysfunction syndrome observed after allogeneic hematopoietic cell transplant (alloHCT). Our aim was to externally validate the impact of high-risk features on the clinical outcomes of adult patients meeting the updated TA-TMA harmonizing criteria. Between 2005 and 2022, 99 patients were diagnosed with TA-TMA at Mayo Clinic Rochester (incidence 6.