CTICasesAlveolar microlithiasis
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Imaging findings
Diffuse increased lung density with calcification and a black pleural sign. The interstitial changes demarcate the secondary pulmonary lobules, with subpleural cystic changes.
Key takeaways
Pulmonary alveolar microlithiasis is characterized by diffuse micronodular calcifications that spare the heart and often present with the 'black pleural sign'.
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