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KMID : 0880420190200091368
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Korean Journal of Radiology
2019 Volume.20 No. 9 p.1368 ~ p.1380
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A Stepwise Diagnostic Approach to Cystic Lung Diseases for Radiologists
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Lee Kyu-Chong
Kang Eun-Young
Yong Hwan-Seok
Kim Cherry
Lee Ki-Yeol
Hwang Sung-Ho
Oh Yu-Whan
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Abstract
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Lung cysts are commonly seen on computed tomography (CT), and cystic lung diseases show a wide disease spectrum. Thus, correct diagnosis of cystic lung diseases is a challenge for radiologists. As the first diagnostic step, cysts should be distinguished from cavities, bullae, pneumatocele, emphysema, honeycombing, and cystic bronchiectasis. Second, cysts can be categorized as single/localized versus multiple/diffuse. Solitary/localized cysts include incidental cysts and congenital cystic diseases. Multiple/diffuse cysts can be further categorized according to the presence or absence of associated radiologic findings. Multiple/diffuse cysts without associated findings include lymphangioleiomyomatosis and Birt-Hogg-Dube syndrome. Multiple/diffuse cysts may be associated with ground-glass opacity or small nodules. Multiple/diffuse cysts with nodules include Langerhans cell histiocytosis, cystic metastasis, and amyloidosis. Multiple/diffuse cysts with ground-glass opacity include pneumocystis pneumonia, desquamative interstitial pneumonia, and lymphocytic interstitial pneumonia. This stepwise radiologic diagnostic approach can be helpful in reaching a correct diagnosis for various cystic lung diseases.
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KEYWORD
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Lung diseases, Computed tomography, Lymphangioleiomyomatosis, Birt-Hogg-Dube syndrome, Histiocytosis, Langerhans cell
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