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Pulmonary hypereosinophilia
1Division of Respiratory Medicine, Department of Medicine, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074. KhooKL@nuh.com.sg
Annals of the Academy of Medicine, Singapore
|August 27, 2004
Summary
Eosinophilic lung diseases present with pulmonary infiltrates and high eosinophil counts. Prompt diagnosis and steroid treatment often lead to rapid symptom and radiographic improvement.
Area of Science:
- Pulmonary Medicine
- Hematology
Background:
- Eosinophilic lung diseases (ELDs) are a spectrum of disorders characterized by eosinophil accumulation in the lungs and blood.
- They often manifest as pulmonary infiltrates with eosinophilia, presenting a broad differential diagnosis.
Observation:
- Three cases of subacute cough, pulmonary infiltrates, and markedly elevated eosinophil counts (>1.5 x 10^9/L) are presented.
- These cases highlight the clinical diversity and unique features within eosinophilic lung diseases.
Findings:
- Excluding infection is a critical initial step in managing these conditions.
- Corticosteroid therapy frequently results in a dramatic resolution of symptoms and radiographic abnormalities.
Implications:
- The diagnosis of pulmonary hypereosinophilia aids in narrowing the differential to four main categories: parasitic/fungal infections, Churg-Strauss syndrome, chronic eosinophilic pneumonia, and idiopathic hypereosinophilic syndrome.
- Effective management strategies, including prompt steroid administration, can significantly improve patient outcomes.