Management of paroxysmal nocturnal hemoglobinuria (PNH).

PNH is a chronic hemolytic disorder due to an intrinsic red cell abnormality. There is no evidence that either prolonged administration of corticosteroids or chemotherapy are beneficial in PNH. On the other hand, patients can live with PNH for many years with supportive management. At the moment complement inhibitor therapy is indicated in most cases; and it is highly desirable that the current financial barriers to this therapy be overcome.