[Pulmonary alveolar microlithiasis]

The paper reports a case of pulmonary alveolar microlithiasis in a 37-year-old female. The diagnosis was established clinically and roentgenologically. The cells of bronchoalveolar lavage were studied morphologically including transmission and scanning electron microscopy. Increased functional activity of alveolar macrophages (AM), a ten-fold increase of their mitotic index, numerous polynuclear AM and foreign-body cells have been revealed.