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Rare Diseases clinical trials in St. Louis, MO
3 studies for Rare Diseases are looking for participants at sites in and around St. Louis (within about 30 miles). Open a study to see who can join and how to contact the study team.
Recruiting for a study here? Feature it at the top of this page — $99 for 30 days →
Clinical and Genetic Evaluation of Individuals With Undiagnosed Disorders Through the Undiagnosed Diseases Network
RecruitingObservational studyHealthy volunteers welcome
- Washington University in St. Louis, St Louis
Study of S-606001 as an Add-on to Enzyme Replacement Therapy (ERT) in Participants With Late-onset Pompe Disease (LOPD)
RecruitingPhase 2
- Washington University in St. Louis, St Louis
The ExTINGUISH Trial of Inebilizumab in NMDAR Encephalitis
RecruitingPhase 2
- Washington University in St. Louis School of Medicine, St Louis
About Rare Diseases
A rare disease is one that affects fewer than 200,000 people in the United States. There are nearly 7,000, affecting more than 25 million Americans.
More about Rare Diseases on MedlinePlus
Rare Diseases trials in other cities
- Boston, MA9 studies
- Chicago, IL8 studies
- Washington, DC8 studies
- Philadelphia, PA7 studies
- Los Angeles, CA5 studies
- Cincinnati, OH5 studies
- Columbus, OH4 studies
- New York City, NY3 studies
- Seattle, WA3 studies
- Durham, NC3 studies
- Atlanta, GA3 studies
- Houston, TX3 studies
Other studies in St. Louis
- Non-Small Cell Lung Cancer73 studies
- Breast Cancer64 studies
- Metastatic Cancer54 studies
- Colorectal Cancer50 studies
- Prostate Cancer46 studies
- Cancer (all types)46 studies
- Lung Cancer39 studies
- Ovarian Cancer38 studies
- Pancreatic Cancer33 studies
- Endometrial Cancer29 studies
- Head and Neck Squamous Cell Carcinoma28 studies
- Heart Failure26 studies
From ClinicalTrials.gov, data retrieved Oct 5, 2026. Each study sets its own eligibility; the study team decides who can join.