Thrombotic Thrombocytopenic Purpura, Acquired

Data about efficacy and safety of daratumumab in iTTP refractory or intolerant to standard immunosuppressive treatments are scarce. Therefore, the investigators aim at collecting evidence on a larger number of patients through a collaborative, international study.

This study aims to investigate whether genetic variation in the TNFAIP3 locus is associated with immune-mediated thrombotic thrombocytopenic purpura (iTTP), and whether such association is mediated by decreased expression of A20 (TNFAIP3). The study includes a case-control design to assess genotype-expression association and a cohort study to evaluate clinical outcomes such as disease relapse.