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  • Title: Diffuse cystic lung diseases: Imaging spectrum and diagnostic approach using high-resolution computed tomography.
    Author: Singh P, Verma AK, Pandey G.
    Journal: Lung India; 2022; 39(6):553-561. PubMed ID: 36629235.
    Abstract:
    The lung cyst is an air-containing lucent area surrounded by thin imperceptible walls. Other lucent lung lesions like centrilobular emphysema, cavity, cystic bronchiectasis, honeycomb cyst, and pneumatoceles are close mimics of a lung cyst on high-resolution computed tomography (HRCT). Various diseases with multiple lung cysts throughout both the lungs are classified as diffuse cystic lung diseases (DCLDs). HRCT is considered the imaging of choice for diagnosis of such diffuse cystic lung diseases. Common DCLDs like lymphangioleiomyomatosis, Birt-Hogg-Dubé syndrome (BHS), Langerhans cell histiocytosis (LCH), lymphocytic interstitial pneumonia (LIP), and desquamative interstitial pneumonia (DIP) can be confidently diagnosed on HRCT without further requirement of histopathological confirmation. The imaging also helps in differentiation of uncommon DCLDs and exclusion of the mimics. This review describes a simple algorithmic approach for DCLDs on HRCT based on scrutinizing the cyst's distribution, size, and shape, background parenchymal changes, and its correlation with clinical features and extrapulmonary imaging findings.
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