Clinical Trials Updated in 2026

NCT00084305 | ACTIVE_NOT_RECRUITING

315 participants

Analysis of Specimens From Individuals With Pulmonary Fibrosis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2004-06-09

Conditions

Pulmonary Fibrosis
Healthy Volunteers
Hermansky-Pudlak Syndrome (HPS)

No Results Yet

NCT00081523 | RECRUITING

3500 participants

Natural History of Sickle Cell Disease

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2004-04-29

Conditions

Pain Crisis

No Results Yet

NCT00067054 | RECRUITING

3000 participants

Apheresis and Specimen Collection Procedures to Obtain Plasma, Peripheral Blood Mononuclear Cells (PBMCs) and Other Specimens for Research Studies

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2003-09-10

Conditions

Sample Collection

No Results Yet

NCT00060775 | COMPLETED

550 participants

The Psychobiology of Childhood Temperament

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2003-11-10

Conditions

Developmental Psychology

No Results Yet

NCT00055172 | RECRUITING

100 participants

Genetic Basis of Immunodeficiency

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2004-04-05

Conditions

Severe Combined Immunodeficiency

No Results Yet

NCT00055029 | COMPLETED

351 participants

Clinical and Genetic Studies of X-Linked Juvenile Retinoschisis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2003-05-19

Conditions

Retinoschisis

No Results Yet

NCT00047996 | ENROLLING_BY_INVITATION

2000 participants

Blood Collection for Research Related to Certain Diseases Involving Blood Vessels

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2002-11-04

Conditions

Sickle Cell Disease

No Results Yet

NCT00039676 | ACTIVE_NOT_RECRUITING

1836 participants

Clinical, Laboratory and Epidemiologic Characterization of Individuals and Families at High Risk of Hematologic Cancer

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2002-07-08

Conditions

Waldenstrom Macroglobulinemia
Chronic Lymphocytic Leukemia
Hodgkin Disease
NonHodgkin Lymphoma
Mixed Lymphoproliferative Disease

No Results Yet

NCT00034424 | COMPLETED

749 participants

Cause of Familial Testicular Cancer

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
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:: 2026-09-01
Start Date:: 2002-07-16

Conditions

Prostate Cancer
Breast Cancer
Colon Cancer
Lung Cancer
Liver Cancer

No Results Yet

NCT00029445 | RECRUITING

500 participants

Leukapheresis to Obtain Plasma or Lymphocytes for Studies of HIV-infected Patients, Including Long-term Non-progressors

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-08-09

Conditions

HIV

No Results Yet

NCT00027326 | ENROLLING_BY_INVITATION

1000 participants

Collection of Blood and Urine From Patients Undergoing Radiation Therapy

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-12-02

Conditions

Carcinoma
Cancer
Tumor

No Results Yet

NCT00024804 | RECRUITING

1000 participants

A Natural History Study of Bone and Mineral Disorders

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-11-19

Conditions

Tumor Induced Osteomalcia
Osteomalacia
Familial Tumoral Calcinosis

No Results Yet

NCT00024479 | RECRUITING

7500 participants

Studies of the Natural History of Rheumatic Diseases

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-10-03

Conditions

Rheumatic Diseases
Arthritis

No Results Yet

NCT00018889 | RECRUITING

2500 participants

Phenotype/Genotype Correlations in Movement Disorders

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-10-22

Conditions

Movement Disorder

No Results Yet

NCT00007150 | ACTIVE_NOT_RECRUITING | PHASE2

622 participants

Treatment of Hemochromatosis

Study Type:: INTERVENTIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-01-01
Completion:: 2026-12-31

Conditions

Hemochromatosis

Interventions

PROCEDURE

No Results Yet

NCT00005909 | RECRUITING

300 participants

Study of Alkaptonuria

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2000-06-21

Conditions

Alkaptonuria

No Results Yet

NCT00004738 | COMPLETED

152 participants

Genetic Analysis of the Chiari I Malformation

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2001-06-04

Conditions

Syringomyelia
Type I Arnold Chiari Malformation

No Results Yet

NCT00001975 | RECRUITING

400 participants

Study of Skin Tumors in Tuberous Sclerosis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 2000-01-26

Conditions

Tuberous Sclerosis

No Results Yet

NCT00001888 | COMPLETED

574 participants

Sample Collections From the Airways of Asthmatic Patients

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1999-06-02

Conditions

Asthma

No Results Yet

NCT00001823 | RECRUITING

7000 participants

Evaluation for NCI Surgery Branch Clinical Research Protocols

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1999-07-11

Conditions

Synovial Cell Cancer
Melanoma
Colorectal Cancer
Lung Cancer
Bladder Cancer

No Results Yet

NCT00001813 | COMPLETED

709 participants

Examination of Clinical and Laboratory Abnormalities in Patients With Defective DNA Repair: Xeroderma Pigmentosum, Cockayne Syndrome, or Trichothiodystrophy

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1999-05-10

Conditions

Cockayne Syndrome
Skin Neoplasms
Xeroderma Pigmentosum
Trichothiodystrophy Syndromes
Genodermatosis

No Results Yet

NCT00001721 | COMPLETED

130 participants

Study of Smith-Lemli-Opitz Syndrome

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1998-09-13

Conditions

Smith-Lemli-Opitz Syndrome

Interventions

DRUG

No Results Yet

NCT00001645 | RECRUITING

800 participants

Evaluation, Treatment and Monitoring of Patients With a Known or Suspected Parasitic Infection

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1998-10-10

Conditions

Malaria
Intestinal Worms
GI Protozoa
Echiniococcus
Strongyloides

No Results Yet

NCT00001620 | ENROLLING_BY_INVITATION

10000 participants

Screening for Hematology Branch Protocols

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1996-12-31

Conditions

Hematologic Disease and Disorders
Donors
Healthy Volunteer

No Results Yet

NCT00001471 | COMPLETED

386 participants

Tissue Biopsy and Imaging Studies in HIV-Infected Patients

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1994-11-30

Conditions

HIV
ICL
Healthy Volunteers

No Results Yet

NCT00001465 | RECRUITING

2000 participants

Study of the Disease Process of Lymphangioleiomyomatosis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1995-12-18

Conditions

Lung Disease
Pneumothorax
Tuberous Sclerosis
Lymphangioleiomyomatosis

Interventions

DEVICE

No Results Yet

NCT00001406 | RECRUITING

800 participants

Activation and Function of Eosinophils in Conditions With Blood or Tissue Eosinophilia

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1997-04-21

Conditions

Immune System Diseases
Eosinophilia
Helminthiasis
Hypersensitivity
Parasitic Disease

No Results Yet

NCT00001403 | RECRUITING

1500 participants

Study of Proteus Syndrome and Related Congenital Disorders

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1994-04-27

Conditions

Proteus Syndrome
PIK3CA Related Overgrowth Spectrum

No Results Yet

NCT00001393 | COMPLETED

616 participants

Genetic Markers for Focal Segmental Glomerulosclerosis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1996-04-15

Conditions

Focal Segmental Glomerulosclerosis
HIV-Associated Focal Segmental Glomerulosclerosis

No Results Yet

NCT00001392 | COMPLETED

537 participants

Pathogenesis of Glomerulosclerosis

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1996-04-16

Conditions

Glomerular Disease

No Results Yet

NCT00001367 | COMPLETED

3813 participants

Diagnosis and History Study of Patients With Different Neurological Conditions

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1993-09-30

Conditions

Nervous System Disease
Healthy Volunteer

No Results Yet

NCT00001360 | RECRUITING

4100 participants

Studies of Blood Flow to the Brain During Thought

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1993-09-17

Conditions

Healthy Volunteer

No Results Yet

NCT00001276 | RECRUITING

1500 participants

Diagnosing and Treating Low Blood Sugar Levels

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1991-05-21

Conditions

Hypoglycemia
Insulinoma

No Results Yet

NCT00001244 | RECRUITING

500 participants

Immune Regulation in Patients With Common Variable Immunodeficiency and Related Inborn Errors of Immunity (IEI)

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1990-01-15

Conditions

XLA
CVID
Yao Syndrome
Blau Syndrome

No Results Yet

NCT00001231 | COMPLETED

1158 participants

Perimenopause-Related Mood and Behavioral Disorders

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1989-03-06

Conditions

Mood Disorder

No Results Yet

NCT00001208 | RECRUITING

2000 participants

Botulinum Toxin for the Treatment of Involuntary Movement Disorders

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1989-10-26

Conditions

Movement Disorders

No Results Yet

NCT00001184 | RECRUITING

1000 participants

Immune Regulation in Ulcerative Colitis or Crohn s Disease

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1998-08-07

Conditions

Inflammatory Bowel Disease
Ulcerative Colitis
Chrohn's Disease

No Results Yet

NCT00001154 | COMPLETED

759 participants

Lipoprotein Metabolism in Normal Volunteers and Patients With High Levels of Lipoproteins

Study Type:: OBSERVATIONAL
Last Updated:: 2026-09-01
Start Date:: 1976-09-03

Conditions

Hypolipoproteinemia
Hypercholesterolemia
Dyslipidemia
Hyperlipidemia

No Results Yet

NCT07796139 | RECRUITING | NA

50 participants

Nasal Dilator Therapy for Patulous Eustachian Tube Dysfunction

Study Type:: INTERVENTIONAL
Last Updated:: 2026-08-31
Start Date:: 2026-04-22
Completion:: 2026-11-01

Conditions

Patulous Eustachian Tube Dysfunction
Eustachian Tube Dysfunction

Interventions

DEVICE

No Results Yet