Pulmonary alveolar microlithiasis

ABSTRACT

A 40-year-old male patient was referred with a history of exertional shortness of breath since a few years ago. Spirometric findings were consistent with a restrictive ventilatory defect. Plain chest radiographs showed sand-like opacities throughout both lungs predominantly in the lower zones. Computerized tomographic scan revealed diffuse bilateral calcified fine nodular pattern. The diagnosis of pulmonary alveolar microlithiasis was confirmed by transbronchial biopsy