Abstract

Hematopoietic stem cell transplantation (HSCT) and chimeric antigen receptor-T (CAR-T) immunotherapy are widely used for the management of hematological malignancies. HSCT can be complicated by endothelial injury syndromes, such as HSCT-thrombotic microangiopathy (HSCT-TMA) and sinusoidal obstructive syndrome/veno-occlusive disease (SOS/VOD), which are life-threatening. Moreover, venous thromboembolic events (VTEs) are common in HSCT recipients due to endothelial injury, use of central venous catheters, prolonged hospitalization, and the development of a procoagulant state. VTEs have also been reported post-CAR-T infusion. The management of thrombotic events in these patients is challenging, due to the high risk of bleeding that is present. CAR-T immunotherapy might be followed by toxicities, such as cytokine release syndrome (CRS) and immune effector cell-associated neuro-toxicity syndrome (ICANS). Endothelial dysfunction is implicated in the pathogenesis of these syndromes. Early recognition and management of the above complications are crucial for better patient outcomes.

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