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A Stepwise Diagnostic Approach to Cystic Lung Diseases for Radiologists

Korean Journal of Radiology 2019년 20권 9호 p.1368 ~ 1380
 ( Lee Kyu-Chong ) - Korea University Guro Hospital Department of Radiology

 ( Kang Eun-Young ) - Korea University Guro Hospital Department of Radiology
 ( Yong Hwan-Seok ) - Korea University Guro Hospital Department of Radiology
 ( Kim Cherry ) - Korea University Ansan Hospital Department of Radiology
 ( Lee Ki-Yeol ) - Korea University Ansan Hospital Department of Radiology
 ( Hwang Sung-Ho ) - Korea University Anam Hospital Department of Radiology
 ( Oh Yu-Whan ) - Korea University Anam Hospital Department of Radiology

Abstract


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.

키워드

Lung diseases; Computed tomography; Lymphangioleiomyomatosis; Birt-Hogg-Dube syndrome; Histiocytosis; Langerhans cell
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