Pulmonary alveolar microlithiasis in siblings.

We report two cases of pulmonary alveolar microlithiasis (PAM) in siblings. The male child was diagnosed initially and family screening led to the diagnosis of the asymptomatic sister. The diagnosis was confirmed by high resolution computed tomography (HRCT) and bone scintigraphy which demonstrated the calcific nature of the lesions. We emphasize the importance of family screening of PAM index cases to detect the disease in the early, asymptomatic stage.