Thrombotic thrombocytopenic purpura (TTP) was first described by Eli Moschcowitz in 1924. The pathophysiology of this disease is related to unusual, large multimers of von Willebrand factor in microcirculation, that are insufficiently cleaved by ADAMTS13 protease (a disintegrin-like and metalloprotease with thrombospondin type 1motif,13). Congenital TTP/Upshaw-Schulman syndrome is less frequent than acquired one TTP/HUS (haemolytic-ureamic syndrome). Short characteristic of patients with inherited form of TTP is reported as well as their clinical and laboratory features and management of treatment.