Reviewed by Gregory P. Cosgrove, MD, FCCP, Jeffrey James Swigris, DO, MS, Tristan J. Huie, MD
Some of the known causes of ILD include:

Connective Tissue or Autoimmune Disease such as:

Occupational and environmental exposure such as:

  • Inorganic dust (silica, hard metal dusts)

  • Organic dust (bacteria, animal proteins)

  • Gases, fumes


Drugs and poisons


  • Residue of active infection of any type

  • Ongoing chronic infections

Some ILDs, while we know a lot about how they affect people, have no known cause. These conditions are termed “idiopathic” (meaning of unknown cause).

Some examples of these include:

  • Idiopathic Pulmonary Fibrosis

  • Idiopathic Nonspecific Interstitial Pneumonia

  • Acute Interstitial Pneumonia

  • Sarcoidosis

Clinical Trials

A Linkage and Association Study in Pulmonary Fibrosis

The purpose of this study is to investigate inherited genetic factors that play a role in the development of familial pulmonary fibrosis and to identify a group of genes that predispose individuals to develop pulmonary fibrosis.  Finding the genes which play a role in pulmonary fibrosis is the first step at developing better methods for early diagnosis and improved treatment for pulmonary fibrosis. The overall hypothesis is that inherited genetic factors predispose individuals to develop pulmonary fibrosis.

The study requires the following:

  • For affected individuals, we confirm your diagnosis by reviewing your medical records. We also ask for a history questionnaire to be filled out and obtain a sample of blood or tissue for genetic studies.
  • Unaffected family members are screened with a questionnaire, and a blood sample is obtained for genetic studies.  Some family members may qualify to undergo high-resolution CT (HRCT) scan for the study.

To be eligible:

The only requirement for this study is to have at least 2 members of your family diagnosed with Idiopathic Pulmonary Fibrosis (IPF).  You may be included in this number.

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