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BRONCHOALVEOLAR LAV AGE IN MIXED CRYOGLOBULINAEMIA ASSOCIATED WITH HEPATITIS C VIRUS

In order to evaluate the presence of an inflammatory process of the lower respiratory tract in patients with mixed cryoglobulinaemia (MQ associated with hepatitis C virus (HCV), bronchoalveolar lavage (BAL) was performed in 16 non-smoking females free of clinical pulmonary symptoms and with normal chest roentgenograms. Pulmonary function tests including diffusion capacity for carbon monoxide (DLCO) were also carried out. Thirteen healthy subjects were evaluated as the control group. Patients with MC had a lower percentage of alveolar macrophages (75% vs 92%, P = 0.001) and a higher percentage of lymphocytes (19.7% vs 7%, P = 0.001) than healthy controls. The percentage of CD3+ lymphocytes was higher in MC patients than in controls (86.5% vs 70%, P = 0.004). No significant differences in the percentage of CD4 + , CD8 + and CD 19+ lymphocytes, neutrophils and eosinophils were found. Pulmonary function tests showed significantly lower values of forced expiratory flow (FEF) 25-75 (P = 0.05) and DLCO (P = 0.05) in MC patients than in healthy controls. No correlations between BAL results and pulmonary function tests were found. The 5 yr follow-up of five patients did not demonstrate deterioration in lung function. Thus, BAL results indicate a subclinical T-lymphocytic alveolitis in MC HCV+ patients that is not associated with a risk of deterioration in lung function.