Bronchoalveolar lavage in patients with connective tissue disease.

Bronchoalveolar lavage (BAL) allows the recovery of cellular and fluid constituents that are derived from the epithelial surface of the lower respiratory tract. BAL fluid and cell analysis has become an important tool for understanding human pulmonary disease. Changes in the quantities and patterns of BAL cells and secretions have been described in a number of chronic lung disorders, especially the diffuse interstitial lung diseases. Specific BAL alterations have correlated with patient outcome and response to therapy. The connective tissue diseases have been associated with serious pleural and/or pulmonary pathology and may be a major cause of morbidity and mortality. BAL appears to be a useful semi-invasive tool in the evaluation and management of lung disease in patients with connective tissue diseases. The article describes the BAL findings in various connective tissue diseases and assesses the usefulness of BAL in the clinical management of patients with pulmonary complications.