RESUMO
To investigate serum levels of CA 19.9, CA 125 and carcinoembryonic antigen [CEA] in patients with different stages of chronic obstructive pulmonary disease [COPD]. Fifty-three consecutive patients [50 males, 3 females, mean age 67.6 +/- 10.1 years] with COPD were included in this study. Serum levels of CA 19.9, CA 25 and CEA were determined by the chemiluminescent immunometric method. Based on values obtained from pulmonary function tests, the patients were divided into 3 groups: moderate [21], severe [18] and very severe [14]. Data were analyzed with a Kruskal-Wallis one-way analysis of variance test and Mann-Whitney U test The mean serum levels of CA 125 and CA 19.9 were significantly higher in patients with very severe COPD [p = 0.013 and p = 0.017, respectively] than in patients with severe and moderate COPD [p < 0.05]. Patients with cor pulmonale had significantly high mean serum levels of CEA, CA 19.9 and CA 125 [p < 0.05]. Patients using a long-acting -agonist and theophylline showed significantly higher mean serum levels of CA 125 than patients who were not [p < 0.05]. Data showed that the increased serum tumor markers in patients with COPD might be due to the severity of COPD, medication and cor pulmonale