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Sarcoidosis is an uncommon inflammatory disease that most frequently involves the lungs and lymph nodes, but can affect virtually any part of the body. Normally, our immune system defends our body against infections and other environmental dangers, but sarcoidosis is associated with abnormal activation of the immune system in the absence of an identifiable cause.

Sarcoidosis causes a typical inflammatory pattern in affected tissues called "granulomas". Granulomas are clusters of inflammatory cells that often form around foreign objects or in response to certain infections, such as tuberculosis. Thus, all other causes of granulomas have to be considered before the diagnosis of sarcoidosis is rendered.


In many cases, sarcoidosis causes minimal symptoms an (More)

Understanding Sarcoidosis

  • Sarcoidosis - OSU Patient Education
  • JAMA Patient Page: Sarcoidosis (American Medical Association)
  • Pulmonary Sarcoidosis
  • Sarcoidosis
  • Sarcoidosis - Interactive Health Tutorial
  • Sarcoidosis: From the NIH
  • Understanding Sarcoidosis (American Lung Association)
  • What Is Sarcoidosis? (National Heart Lung and Blood Institute)

  • Commonly Asked Questions

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  • How Do I Treat Sarcoidosis When Conventional Therapies Fail?
  • How Many Stages Does Sarcoidosis Have?
  • Is Sarcoidosis an Autoimmune Disease?
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  • Additional Information

  • Symptoms and Tests
  • Treatment
  • Complications
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    NetWellness Expert Elliott D Crouser

    Elliott D Crouser, MD
    The Ohio State University

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    Last Updated: Mar 07, 2014