NIH launches massive hunt to solve medical mysteries for thousands
NCT ID NCT02450851
First seen Jun 27, 2026 · Last updated Sep 18, 2026 · Updated 8 times
Summary
This study aims to diagnose people with severe, undiagnosed conditions that have baffled doctors. Up to 20,000 participants will undergo advanced genetic testing and clinical exams at multiple research centers. The goal is to provide answers, discover new diseases, and improve care for those with rare disorders.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 20,000 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Sep 2015
- Expected to finish
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Dec 2099
An estimate. End dates often move.
- Lead sponsor
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A government research agency
The lead sponsor is the US National Institutes of Health.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Individuals with undiagnosed conditions
- Ages
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1 month to 100 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
* INCLUSION CRITERIA: Ideal participants for tier 2-4 evaluations include individuals with: * One or more objective findings pertinent to the phenotype for which a case was submitted. * No diagnosis despite evaluation by specialists who assessed the patient for the objective finding(s). * Agreement for the storage and sharing of information and biomaterials, in an identified fashion amongst the UDN centers, and in a de-identified fashion to research sites beyond the network. Participants unable to consent can be enrolled. EXCLUSION CRITERIA: Individuals who are unlikely to be assigned to tier 2-4 evaluations include those with: * Reported symptoms with no relevant objective findings. * A diagnosis explaining objective findings. * A diagnosis suggested on record review. * Unwillingness to share data.
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Get notified about this study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
27 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Baylor College of Medicine
RECRUITINGHouston, Texas, 77030, United States
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Boston Children s Hospital
RECRUITINGBoston, Massachusetts, 02115, United States
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Brigham and Women's Hospital
RECRUITINGBoston, Massachusetts, 02115, United States
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Children's Hospital of Philadelphia
RECRUITINGPhiladelphia, Pennsylvania, 19104, United States
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Childrens National Medical Center
RECRUITINGWashington D.C., District of Columbia, 20010, United States
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Duke University Health System
RECRUITINGDurham, North Carolina, 27710, United States
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Harvard T.H. Chan School of Public Health
COMPLETEDBoston, Massachusetts, 02115, United States
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Harvard U Faculty of Medicine
NOT_YET_RECRUITINGBoston, Massachusetts, 02115, United States
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HudsonAlpha Institute for Biotechnology, Inc.
COMPLETEDHuntsville, Alabama, 35806, United States
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Indiana University
RECRUITINGIndianapolis, Indiana, 46202-5262, United States
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Leland Stanford Junior University
RECRUITINGStanford, California, 94305, United States
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Lucile Salter Packard Children's Hospital at Stanford
COMPLETEDStanford, California, 94020, United States
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Lurie Children s Hospital
NOT_YET_RECRUITINGChicago, Illinois, 60611, United States
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Massachusetts General Hospital
RECRUITINGBoston, Massachusetts, 02114, United States
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Mayo Clinic
RECRUITINGRochester, Minnesota, 55905, United States
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Medical College of Wisconsin
RECRUITINGMilwaukee, Wisconsin, 53226, United States
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National Institutes of Health Clinical Center
RECRUITINGBethesda, Maryland, 20892, United States
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New York Genome Center
ACTIVE_NOT_RECRUITINGNew York, New York, 10013, United States
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Oregon Health Sciences University
COMPLETEDPortland, Oregon, 97201-3098, United States
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Pacific Northwest National Laboratory
COMPLETEDRichland, Washington, 99354, United States
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Seattle Children's Hospital
RECRUITINGSeattle, Washington, 98101, United States
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Stanford Hospital and Clinics
RECRUITINGStanford, California, 94305, United States
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Stanford University
RECRUITINGStanford, California, 94305-5584, United States
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University of Alabama at Birmingham
RECRUITINGBirmingham, Alabama, 35233, United States
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University of California, Irvine Medical Center
RECRUITINGOrange, California, 92668, United States
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University of California, Los Angeles
RECRUITINGLos Angeles, California, 90095, United States
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University of Miami Miller School of Medicine
RECRUITINGMiami, Florida, 33136, United States
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University of Oregon
NOT_YET_RECRUITINGEugene, Oregon, 97403, United States
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University of Pennsylvania
RECRUITINGPhiladelphia, Pennsylvania, 19104-6056, United States
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University of Utah
RECRUITINGSalt Lake City, Utah, 84112, United States
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University of Washington
RECRUITINGSeattle, Washington, 98195, United States
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Vanderbilt University Medical Center
RECRUITINGNashville, Tennessee, 37232, United States
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Washington University in St. Louis
RECRUITINGSt Louis, Missouri, 63110, United States
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