View clinical trials related to Hematologic Diseases.
Filter by:To determine the prevalence of hepatitis delta virus (HDV) in a large cohort of hemophiliacs and to elucidate the role of HDV in the development and progression of liver disease in this population.
To determine the role of drugs in the etiology of aplastic anemia, agranulocytosis, and thrombocytopenic purpura. Drugs used in chemotherapy and immunotherapy were excluded.
To continue to follow the newborn cohort and the over-35 years of age cohort from the Cooperative Study of Sickle Cell Disease (CSSCD), a study of the natural history of sickle cell disease.
To determine the natural history of sickle cell disease from birth to death in order to identify those factors contributing to the morbidity and mortality of the disease.
To supplement the fourth National Health and Nutrition Examination Survey protocol to include data on the common heart, vascular, lung, and blood diseases.
To conduct a baseline survey on cardiovascular, respiratory, and other major systemic disease and risk factors in members of the Vietnam Era Twin Registry.
Approximately 40% of the patients with myelodysplastic syndrome (MDS) die as a consequence of their cytopenia. As in aplastic anemia, the cytopenia of MDS may be partly due to cytotoxic T cell activity. Immunosuppressive therapy may therefore reverse the cytopenia. In a phase II pilot study of anti-thymocyte globin (ATG) to treat myelodysplastic syndrome (MDS); 41% of patients (61% of patients with refractory anemia) have responded in terms of transfusion independence. Recently, Jonasova et al [32] reported a 82% substantial hematological response rate in 18 patients with MDS of the refractory anemia (RA) subtype treated with cyclosporine alone. Just over 50% of the patients in this series had MDS of the hypocellular type. Cyclosporine alone if indeed efficacious would be a powerful therapeutic option that could be readily used by hematologists in the community to treat patients with MDS. This efficacy needs to be proven in a larger study which includes patients with the other subtypes of MDS and more patients with the non-hypocellular forms of MDS (which constitute approximately 70% of the cases in the community). As MDS is a heterogeneous group of disorders, a randomized comparison with the other immunomodulating intervention of proven benefit, ATG, is appropriate. In this randomized study patients with MDS will receive either ATG alone or cyclosporine alone.
Diamond Blackfan anemia (DBA) is a condition in which the bone marrow is underdeveloped. DBA is considered a congenital disease, meaning patients are born with it. In DBA there is a lack of cells that give rise to red blood cells. The other elements produced in the bone marrow, such as white blood cells and platelets, are normal. Standard treatments used for this disorder such as steroids and bone marrow transplants are associated with failure, relapse, side-effects, increased morbidity, and even death. Two drugs, antithymocyte globulin (ATG) and cyclosporin have been used to treat DBA, but have only provided occasional responses. No study has ever combined these two drugs for the treatment of DBA. This study is designed to explore the combined use of ATG and cyclosporine as a rational approach to the treatment of DBA.
The Hematology Service provides hematology consultations for patients at the Clinical Center and participates in the training of hematology fellows. Patients with a broad range of hematologic disorders must be available in order for the senior staff of the Service to maintain clinical expertise and to provide the breadth of experience necessary for the fellowship program. The purpose of this protocol is to meet these needs by allowing the Hematology Service to see patients with a spectrum of hematologic diseases not studied on existing research protocols at the NIH. These patients will be evaluated over the course of several outpatient visits and returned to the care of their referring physicians.This study was developed to evaluate and possibly treat patients with blood disorders. The Hematology Service of the National Institutes of Health is responsible for the care of patients participating in research studies. In addition the Hematology Service also provides consultation for small groups of patients with blood disorders that have not been diagnosed or that may need special testing. This study will also provide doctors at the NIH the opportunity to learn more about a wide range of blood disorders and conditions. Patients participating in this study will be evaluated over the course of several outpatient visits and will continue to be cared for by their regular physician.
This study allows the evaluation of subjects in order to determine their ability to safely participate in other active research studies. After subjects complete the screening process, they will be offered the opportunity to participate in an active research study, or if no appropriate studies are available information and recommendations will be provided for other treatment options.