Study Status: Withdrawn
Recruit Status: Withdrawn
Study Type: Interventional
Official Title: Prophylactic Plasma Infusion Therapy for Congenital Thrombotic Thrombocytopenic Purpura
Brief Summary: Congenital thrombotic thrombocytopenic purpura (TTP), also called Upshaw-Schulman Syndrome or hereditary or familial TTP is a rare, but severe disease. The purpose of this study is to determine how infusions of plasma to patients with congenital TTP correlate with symptoms and signs of activity of the disease, and to determine why some patients need more frequent infusions of plasma than others to prevent acute attacks of the disease.