Pulmonary alveolar microlithiasis: diagnosed by sputum examination and transbronchial biopsy

A case of pulmonary alveolar microlithiasis presenting with uncharacteristic radiological features who was diagnosed on the basis of sputum examination and confirmed by transbronchial biopsy, is being reported. Azoospermia resulting in primary infertility and increased lung volumes by helium dilution test were other noteworthy features of the case.