[Pulmonary alveolar proteinosis--diagnostic problem].

A case of a 37 years old woman with suspicion of sarcoidosis is presented. However, the course of disease was not typical for sarcoidosis. The previous diagnosis was verified. The results of bronchoalveolar lavage and histological examination of lung biopsy sample revealed features characteristic for pulmonary alveolar proteinosis. The diagnostic methods, clinical course of disease and the ways of treatment are presented.