Clinical Trials Updated in 2026

NCT00655096 | RECRUITING

10000 participants

Screening for Research Participants

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2008-08-20

Conditions

Eye Diseases

No Results Yet

NCT00598351 | RECRUITING

269 participants

Natural History Study of Patients With Neurofibromatosis Type 2

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2008-03-21

Conditions

Neurofibromatosis

No Results Yet

NCT00469339 | COMPLETED

498 participants

Risk Communication Within Mexican-American Families

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2007-04-27

Conditions

Breast Cancer
Diabetes
Colon Cancer
Cardiovascular Disease

Interventions

BEHAVIORAL

No Results Yet

NCT00450788 | COMPLETED

50045 participants

Esophageal Cancer in Northeastern Iran

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2007-03-15

Conditions

Esophageal Cancer
GI Disease

No Results Yet

NCT00442195 | RECRUITING

1000 participants

Collection and Analysis of Blood, Bone Marrow, and Buccal Mucosa Samples From Healthy Volunteers

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2007-03-03

Conditions

Healthy Volunteers

No Results Yet

NCT00404560 | RECRUITING

2000 participants

Detection and Characterization of Infections and Infection Susceptibility

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2007-01-02

Conditions

Immune Deficiencies

No Results Yet

NCT00397280 | RECRUITING

750 participants

Immune Cell Response to Stimuli

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2009-07-13

Conditions

Inflammation

No Results Yet

NCT00368381 | WITHDRAWN | PHASE4

0 participants

Hydrocortisone Versus Hydrocortisone Plus Fludrocortisone for the Treatment of Adrenal Insufficiency in Severe Sepsis

Study Type:: INTERVENTIONAL
Last Updated:: 2026-08-31
Start Date:: 2006-09-30
Completion:: 2009-07-31

Conditions

Sepsis
Adrenal Insufficiency

Interventions

DRUG

No Results Yet

NCT00361829 | COMPLETED

2355 participants

The Influence of Maternal Age, Employment Status, and Parenthood Status on Children's Cognitive Development

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 1988-02-17

Conditions

Child Development

No Results Yet

NCT00353782 | RECRUITING

2000 participants

Causes and Natural History of Dyslipidemias

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-10-14

Conditions

Hypercholesterolemia
Atherosclerosis

No Results Yet

NCT00344331 | RECRUITING

900 participants

Evaluation of Biochemical Markers and Clinical Investigation of Niemann-Pick Disease, Type C

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2006-08-14

Conditions

Niemann-Pick Disease, Type C

No Results Yet

NCT00344188 | RECRUITING

289 participants

Diagnosis and Treatment of Leishmania Infections

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2001-11-30

Conditions

Kinetoplastid
Skin Diseases, Parasitic
Parasitic Diseases
Leishmaniasis
Protozoa

No Results Yet

NCT00342654 | COMPLETED

32902 participants

Nutrition Intervention Trials in Linxian Follow-up Study

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 1999-05-20
Completion:: 2025-12-02

Conditions

Esophageal Cancer
Gastric Cancer

No Results Yet

NCT00341679 | COMPLETED

719 participants

Studies of the Natural History and Pathogenesis of Autoimmune/Connective Tissue Diseases

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2005-07-13

Conditions

Autoimmune/Connective Tissue Diseases
Idiopathic Inflammatory Myopathies
Polymyositis
Dermatomyositis

No Results Yet

NCT00341237 | RECRUITING

25000 participants

Personalized Environment and Genes Study

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2010-05-26

Conditions

Diabetes
Heart Disease
Asthma

No Results Yet

NCT00339495 | ACTIVE_NOT_RECRUITING

154900 participants

Prostate Lung Colorectal and Ovarian (PLCO) Cancer Screening Trial

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 1998-05-01
Completion:: 2026-12-31

Conditions

Cancer
Death

No Results Yet

NCT00326482 | COMPLETED

127 participants

Liver Fibrosis in HIV-Infected Patients With Elevated Liver Enzymes on Antiretroviral Therapy

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2006-07-31

Conditions

Liver Fibrosis
Steatohepatitis
Elevated Transaminases

No Results Yet

NCT00302146 | COMPLETED

64 participants

Positron Emission Tomography (PET) Imaging in People With Gaucher Mutations

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2006-05-23

Conditions

Parkinson Disease
Gaucher Disease

Interventions

DRUG

No Results Yet

NCT00258570 | RECRUITING

2000 participants

Genetic Polymorphisms in Idiopathic Pulmonary Fibrosis (IPF)

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-01-31
Completion:: 2035-07-31

Conditions

Pulmonary Fibrosis

No Results Yet

NCT00258544 | ACTIVE_NOT_RECRUITING

80 participants

Microarray Analysis of Gene Expression in Idiopathic Pulmonary Fibrosis (IPF)

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2001-10-31
Completion:: 2030-07-31

Conditions

Pulmonary Fibrosis

No Results Yet

NCT00250159 | RECRUITING

3000 participants

Natural History Study of Patients With Excess Androgen

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2006-01-02

Conditions

Congenital Adrenal Hyperplasia (CAH)
Familial Male-Limited Precocious Puberty (FMPP)

No Results Yet

NCT00246857 | RECRUITING

5000 participants

Screening Protocol for Genetic Diseases of Lymphocyte Homeostasis and Programmed Cell Death

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2007-02-12

Conditions

Primary Immune Deficiency

No Results Yet

NCT00182858 | RECRUITING

5000 participants

Tissue Procurement for Biomedical Research

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-06-26
Completion:: 2028-12-31

Conditions

Normal Volunteers

No Results Yet

NCT00114647 | RECRUITING

3000 participants

Apheresis to Obtain Plasma or White Blood Cells for Laboratory Studies

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 1984-01-09

Conditions

Healthy Volunteers
HIV

No Results Yet

NCT00111384 | COMPLETED

313 participants

Study of Disease Severity in Adults With Neurofibromatosis Type 1 (NF1)

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2005-07-27

Conditions

Neurofibromatosis Type 1
Legius Syndrome

No Results Yet

NCT00106925 | RECRUITING

1000 participants

Long-term Evaluation and Follow-up Care of Patients Treated With Stem Cell Transplants

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2005-04-22

Conditions

Graft-versus-leukemia
Graft vs Host Disease
Graft Rejection

No Results Yet

NCT00092235 | RECRUITING

650 participants

Natural History Study of Clinical and Biological Factors Determining Outcomes in Chronic Graft-Versus-Host Disease

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2004-10-26

Conditions

Chronic Graft vs. Host Disease

No Results Yet

NCT00071526 | RECRUITING

5000 participants

Urinary Vitamin C Loss in Diabetic Subjects

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2006-04-11

Conditions

Diabetes

No Results Yet

NCT00071045 | ENROLLING_BY_INVITATION

6000 participants

Collection of Tissue Specimens From Patients With Solid Tumors or Blood Disorders and Their HLA-Compatible Family Members

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-10-08

Conditions

Neoplasms
Hematologic Neoplasms
Healthy Volunteers

No Results Yet

NCT00065676 | COMPLETED | PHASE2

24 participants

Investigating the Use of Quercetin on Glucose Absorption in Obesity, and Obesity With Type 2 Diabetes

Study Type:: INTERVENTIONAL
Last Updated:: 2026-08-31
Start Date:: 2010-04-30
Completion:: 2015-12-21

Conditions

Obesity
Diabetes

Interventions

OTHER

No Results Yet

NCT00055172 | RECRUITING

100 participants

Genetic Basis of Immunodeficiency

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2004-04-05

Conditions

Severe Combined Immunodeficiency

No Results Yet

NCT00055055 | COMPLETED

1056 participants

Study of Families With Twins or Siblings Discordant for Rheumatic Disorders

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-04-21

Conditions

Rheumatoid Arthritis
Systemic Lupus Erythematosus
Idiopathic Inflammatory Myopathies

No Results Yet

NCT00055029 | COMPLETED

351 participants

Clinical and Genetic Studies of X-Linked Juvenile Retinoschisis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-05-19

Conditions

Retinoschisis

No Results Yet

NCT00051857 | RECRUITING

750 participants

MRI Study of Musculoskeletal Function

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-03-05

Conditions

Abnormalities
Imaging
Patellofemoral Pain Syndrome

No Results Yet

NCT00050752 | RECRUITING

1130 participants

Hereditary Leiomyomatosis Renal Cell Cancer - Study of the Genetic Cause and the Predisposition to Renal Cancer

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-02-24

Conditions

Renal Tumor Histology
Cutaneous Leiomyoma
Kidney Cancer

No Results Yet

NCT00044122 | RECRUITING

600 participants

Study of Factors Regulating Mast Cell Proliferation

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2002-09-18

Conditions

Mastocytosis
Monoclonal
Bone Marrow
Tryptase

No Results Yet

NCT00040222 | COMPLETED

377 participants

Clinical, Genetic, Behavioral, Laboratory and Epidemiologic Characterization of Individuals and Families at High Risk of Breast/Ovarian Cancer

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2002-07-01

Conditions

Familial Ovarian Cancer
Familial Breast Cancer
BRCA1-associate Malignancies
BRCA2-associated Malignancies

No Results Yet

NCT00039689 | RECRUITING

750 participants

Leukapheresis Procedures to Obtain Plasma and Lymphocytes for Research Studies on Antiretroviral Naive HIV-1 Research Participants

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2002-07-12

Conditions

HIV

No Results Yet

NCT00034424 | COMPLETED

749 participants

Cause of Familial Testicular Cancer

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2003-01-13

Conditions

Testicular Cancer

No Results Yet

NCT00034216 | RECRUITING

1750 participants

Collection of Blood From Patients With Cancer

Study Type:: OBSERVATIONAL
Last Updated:: 2026-08-31
Start Date:: 2002-07-16

Conditions

Prostate Cancer
Breast Cancer
Colon Cancer
Lung Cancer
Liver Cancer

No Results Yet