Pulmonary function in follow-up of 35 patients with paracoccidioidomycosis (South American Blastomycosis) Pulmonary lesions observed in pbmycosis were denominated: mild, moderate and severe according to the criteria established from radiolgical findings by the authors. Bilateral nodulofibrolinear and cotton interstitials infiltrates were identified respectivelly on 34 and 23 patients. Later radiological analyses showed mild, moderate and severe pulmonary lesions respectivilly in 6; 10 and 19 evolving to improved in 2; worsened in 15 and maintained in 18 patients. Normal spirographic test in 12; obstructive defect in 20; mixed in 3; hyperventilation in 34 and alveolar arterial difference increased in all patients. Residual fibrosis observed in radiological maintained and worsened of 33 themes added to chronic obstructive pulmonary disease recognized by lung function tests both were able to explain the development of Cor pulmonale syndrome in 6 patients.