Clinical trials
Observational Rare Diseases trials in the United States
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
95 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 3 |
| 2001 | 2 |
| 2003 | 1 |
| 2004 | 1 |
| 2006 | 1 |
| 2009 | 1 |
| 2010 | 3 |
| 2011 | 1 |
| 2013 | 1 |
| 2014 | 1 |
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 5 |
| 2026 | 3 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 37 |
| Recruiting | 24 |
| Unknown status | 20 |
| Enrolling by invitation | 7 |
| Terminated | 5 |
| Withdrawn | 2 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| National Center for Research Resources (NCRR) | 38 |
| National Human Genome Research Institute (NHGRI) | 6 |
| Associazione Angela Serra per la ricerca sul cancro | 3 |
| Boston Children's Hospital | 2 |
| Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) | 2 |
| Friedreich's Ataxia Research Alliance | 2 |
| Ipsen | 2 |
| Mayo Clinic | 2 |
| National Heart, Lung, and Blood Institute (NHLBI) | 2 |
| National Institute of Allergy and Infectious Diseases (NIAID) | 2 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Rare Diseases | 95 |
| Genetic Diseases, Inborn | 23 |
| Neurologic Manifestations | 11 |
| Endocrine System Diseases | 10 |
| Mental Disorders | 10 |
| Respiratory Tract Diseases | 9 |
| Undiagnosed Diseases | 6 |
| Metabolism, Inborn Errors | 5 |
| Arthritis | 4 |
| Cardiovascular Diseases | 4 |
Trials
Showing 1 to 25 of 95. Each trial links to its page on Pharma Observatory.
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.