[Pulmonary alveolar microlithiasis (disease in 2 siblings--case report)]

This article presents case reports on brother and sister suffering from microlithiasis alveolaris pulmonum. Diagnosis was established by means of the course of the disease, the relatively typical x-ray film and the findings on performing scintigraphy of the skeleton and also by computed tomography. Findings confirmed that the course of the disease is symptom-free for a long time; that it occurs in both sexes; and that it becomes manifest with considerable incidence in some families. Pulmonary alveolar microlithiasis is not a generalised metabolic disease, since it affects the lungs only. If the aetiology remains unclear, no causal treatment can be effected.