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Diseases Studied

The Rare Diseases Clinical Research Network is an NIH-funded research network of 20 active consortia or research groups working to advance treatment for diseases that are rare. Use the search tools on this page to find the diseases we currently study. You can reach out to the indicated consortia or research groups for more information on those diseases and studies underway.

This network focuses on clinical research and does not generally support clinical care outside of research activities. To learn about other rare diseases, please visit the Genetic and Rare Diseases Information Center (GARD), which is an NIH program that helps the public find reliable information about rare and genetic diseases. Their staff are specialists. Contact them at 1-888-205-2311 or email

All Diseases > Idiopathic Bronchiectasis

Idiopathic Bronchiectasis (IB)

Disease Category: Genetic Mucociliary Disorders

A progressive disorder in which the bronchi (air passages within the lungs that diverge from the windpipe) are permanently dilated (enlarged) and irreversibly scarred. This occurs without a known underlying cause such as recurrent infections, inflammation, aspiration, immunodeficiencies, ciliary abnormalities, or genetic mutations. Symptoms include chronic coughing, hemoptysis (coughing up blood), weight loss, chest pain or tightness, dyspnea (shortness of breath), wheezing, nail clubbing, and fatigue.

Research groups studying this disease