Abstract
This case report describes the clinical course of a patient with relapsed IgA kappa multiple myeloma with high-risk cytogenetics. Initially treated with daratumumab-bortezomib-lenalidomide-dexamethasone (Dara-VRD) then transitioned to lenalidomide maintenance. However, he experienced a relapse and was treated with carfilzomib-based therapy (CFZ) but developed drug-induced thrombotic microangiopathy (DI-TMA). Despite receiving eculizumab and supportive care, the patient's condition worsened, leading to encephalopathy and refractory gastrointestinal bleeding in the setting of persistent thrombocytopenia. Ultimately, the decision was made to transition to comfort-focused care. DI-TMA has been documented with various proteasome inhibitors such as ixazomib and bortezomib. Additionally, other medications such as cyclosporine, tacrolimus, clopidogrel, ticlopidine, and interferon have been associated with DI-TMA as well (Pisoni et al. (Drug Saf 24:491-501, 2001) [18]). Here we discuss a case of carfilzomib-induced TMA (CFZ-TMA) refractory to eculizumab as well as a review of the published literature.
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