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Bronchoalveolar lavage in extrapulmonary sarcoidosis
H C Hoogsteden1, J J van Dongen, H J Adriaansen
1Department of Pulmonary Medicine, Academic Hospital Dijkzigt, Rotterdam, The Netherlands.
Chest
|July 1, 1988
Summary
In extrapulmonary sarcoidosis patients, T cell alveolitis may progress gradually. A significant number show discrepancies between chest x-ray findings and T cell presence in bronchoalveolar lavage fluid.
Area of Science:
- Immunology
- Pulmonology
- Radiology
Background:
- Sarcoidosis is a multisystem inflammatory disease.
- Extrapulmonary sarcoidosis can present with varying radiographic findings.
- Bronchoalveolar lavage (BAL) fluid analysis offers insights into lung inflammation.
Purpose of the Study:
- To investigate immunologic markers in BAL fluid of patients with extrapulmonary sarcoidosis.
- To correlate BAL fluid T lymphocyte levels with chest x-ray findings in extrapulmonary sarcoidosis.
- To compare these findings with pulmonary sarcoidosis and healthy controls.
Main Methods:
- Recruitment of patients with extrapulmonary sarcoidosis, pulmonary sarcoidosis, and healthy volunteers.
- Evaluation of chest x-ray findings (radiographic staging).
- Analysis of immunologic marker expression (CD3+ T lymphocytes) in BAL fluid.
Main Results:
- All sarcoidosis groups showed increased CD3+ T lymphocytes in BAL fluid compared to controls.
- Patients with extrapulmonary sarcoidosis and normal chest x-rays had lower T lymphocyte percentages than those with abnormal x-rays.
- A significant discrepancy between radiographic findings and BAL fluid T cell analysis was observed in over 50% of extrapulmonary sarcoidosis patients.
Conclusions:
- A gradual progression of T cell alveolitis may occur in extrapulmonary sarcoidosis.
- Chest x-ray findings do not always reflect the extent of alveolitis in extrapulmonary sarcoidosis.
- Immunologic marker analysis in BAL fluid is crucial for assessing lung inflammation in sarcoidosis.