Journal
JORNAL BRASILEIRO DE PNEUMOLOGIA
Volume 35, Issue 6, Pages 561-573Publisher
SOC BRASILEIRA PNEUMOLOGIA TISIOLOGIA
DOI: 10.1590/S1806-37132009000600010
Keywords
Pulmonary eosinophilia; Hypereosinophilic syndrome; Aspergillosis, allergic bronchopulmonary; Churg-Strauss syndrome
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Pulmonary eosinophilia comprises a heterogeneous group of diseases defined by eosinophilia in pulmonary infiltrates (bronchoalveolar lavage fluid) Or in tissue (lung biopsy specimens). Although the inflammatory infiltrate is composed of macrophages, lymphocytes, neutrophils and eosinophils, eosinophilia is an important marker for the diagnosis and treatment. Clinical and radiological presentations can include simple pulmonary eosinophilia, chronic eosinophilic pneumonia, acute eosinophilic pneumonia, allergic bronchopulmonary aspergillosis and pulmonary eosinophilia associated with a systemic disease, such as in Churg-Strauss syndrome and hypereosinophilic syndrome. Asthma is frequently concomitant and can be a prerequisite, as in allergic bronchopulmonary aspergillosis and Churg-Strauss syndrome. In diseases with systemic involvement, the skin, the heart and the nervous system are the most affected organs. The radiological presentation can be typical, or at least suggestive, of one of three types of pulmonary eosinophilia: chronic eosmophilic pneumonia, acute eosinophilic pneumonia and allergic bronchopulmonary aspergillosis. The etiology of pulmonary eosinophilia can be either primary (idiopathic) or secondary, due to known causes, such as drugs, parasites, fungal infection, mycobacterial infection, irradiation and toxins. Pulmonary eosinophilia can be also associated with diffuse lung diseases, connective tissue diseases and neoplasia.
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