Resumen

LIMA, Jandira Helena et al. Subacute hypersensitivity pneumonitis. Rev Port Imunoalergologia [online]. 2013, vol.21, n.2, pp.125-130. ISSN 0871-9721.

Hypersensitivity pneumonitis, also known as extrinsic allergic alveolitis, is a heterogeneous syndrome with nonspecific symptoms and physical findings, and probably under-diagnosed due to confusion with infectious diseases and other lung diseases. Atypical forms are a diagnostic challenge and the histological findings may provide a major contribution to the presence of hypersensitivity pneumonitis. We present a case report of a woman, ex -smoker, recently hospitalized for suspected sepsis, with a past medical history of progressive dyspnea and outdoor exposure to parrots since 2000. Initial work-up is suggestive of usual interstitial pneumonia, but bronchoalveolar lavage showed lymphocytosis 43%. To resolve apparent contradictive findings a lung biopsy was performed and showed histopathological changes suggestive of subacute hypersensitivity pneumonitis. After cessation of the exposure and treatment with corticosteroids, both clinical and radiological resolution occurred.

Palabras clave : Extrinsic allergic alveolitis; hypersensitivity pneumonitis; interstitial lung disease.

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