Hypersensitivity Pneumonitis

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This information was reviewed and approved by Cecile S. Rose, MD, MPH (6/30/2012).

Hypersensitivity pneumonitis (HP) is an inflammation of the lungs caused by inhaling a foreign substance. 

These foreign substances can stimulate an immune reaction in the small airways and air sacs of the lung. This may lead to acute lung disease. Over time and with continued exposure to the causative substance, long-lasting (chronic) lung disease with permanent scarring can occur.


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  • Cecile S. Rose

    Cecile S. Rose, MD, MPH

  • Joseph Cooley

    Joseph Cooley, DO

  • Rohit K. Katial

    Rohit K. Katial, MD

  • Jeremy T. Hua

    Jeremy T. Hua, MD, MPH

  • Shelby R. Jenkins

    Shelby R. Jenkins, OTR

  • Rebecca C. Keith

    Rebecca C. Keith, MD

  • Matthew Koslow

    Matthew Koslow, MD

  • Richard Kraus

    Richard Kraus, PA-C

  • Silpa D. Krefft

    Silpa D. Krefft, MD, MPH

  • James K. O'Brien

    James K. O'Brien, MD, FACP, FCCP

  • Clara Restrepo

    Clara Restrepo, MD

  • Joshua J. Solomon

    Joshua J. Solomon, MD

  • Jeff Swigris

    Jeff Swigris, DO, MS

  • Kalie M. VonFeldt

    Kalie M. VonFeldt, PA-C, MS

  • Catherine Wittman

    Catherine Wittman, MD

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