Alveolar microlithiasis is a very rare disease. On CT (Figure 135) diffuse micronodular calcifications with a sand-like appearance can be seen in the basal-dorsal regions. Typically, the condition exhibits a poor correlation between radiographic findings and symptoms, often the patient appears worse on CT than clinically.
![](https://hrctpatternrecognition.com/wp-content/uploads/2020/01/8633854Alveolarmicrolithiasis.jpg)