Thrombotic thrombocytopenic purpura and pregnancy: report of four cases and literature review.

Thrombotic thrombocytopenic purpura (TTP) is a severe life-threatening hematological disorder affecting the microcirculation of multiple organ systems. Infection, pregnancy, cancer, drugs, and surgery are frequently associated with the initial episodes and relapses. Women who are either pregnant or in the postpartum period make up 10-25% of TTP patients, suggesting the interrelationship between TTP and pregnancy. The introduction of aggressive treatment with plasma transfusion and plasmapheresis has improved maternal and fetal survival rates. We report four cases of pregnancy-related TTP, describing the clinical course of patients, including response to therapy and pregnancy outcomes. Three out of four (75%) patients were treated by daily single session of plasmapheresis for a period ranged between 3 and 23 days. One patient had complete response to treatment with no sequelae, the second patient had resistant disease and died due to multiorgan failure, while the third patient had complete response after 2 episodes of TTP, which was complicated by intrauterine fetal growth retardation and death. Review of the previously reported cases of pregnancy-related TTP and the current treatment options for this rare condition are discussed also. Copyright 2004 Wiley-Liss, Inc.