Italian iTTP Registry (a Prospective Observational Study)
ItaliTTP is an observational, prospective, single-arm, national, multicenter, non-pharmacological cohort study aimed at better defining and understanding the natural history, disease severity, and clinical outcomes of patients with immune-mediated thrombotic thrombocytopenic purpura (iTTP) in Italy. A minimum of 132 consecutive patients with acute iTTP (first event or relapse) will be enrolled for 3 years, with the possibility of extension, with a follow-up period of 3 years.
• Patients with an acute iTTP episode (first event or relapse), defined by thrombocytopenia and microangiopathic hemolytic anemia, in the absence of alternative causes, and the presence of severe deficiency of ADAMTS13 activity (\< 10 IU/dL or \<10% of normal value) and anti-ADAMTS13 autoantibodies
• Both male and female patients, aged 12 years or older
• Patients who have signed the informed consent for the participation to the study