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Intrapulmonary Bronchogenic Cyst: CT and Pathologic Findings in Five Adult Patients

Young Cheol Yoon1, Kyung Soo Lee1, Tae Sung Kim1, Jhingook Kim2, Young Mog Shim2 and Joungho Han3

1 Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50, Ilwon-Dong, Kangnam-Ku, Seoul 135-710, Korea.
2 Department of Thoracic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.
3 Department of Diagnostic Pathology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 135-710, Korea.



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  		Fig. 1A. —Intrapulmonary bronchogenic cyst in 37-year-old woman. High-resolution CT scan (1-mm collimation, mediastinal window setting) obtained at level of aortic arch shows well-defined homogeneous 48-mm soft-tissue lesion in left upper lobe with attenuation of 40 H. Enhanced scan (not shown) showed no changes in attenuation.

 


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  		Fig. 1B. —Intrapulmonary bronchogenic cyst in 37-year-old woman. High-resolution CT scan (lung window setting) obtained at same level as A shows bandlike linear attenuation (arrow) in surrounding lung. Area of mosaic low attenuation (arrowheads) is also visible.

 


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  		Fig. 1C. —Intrapulmonary bronchogenic cyst in 37-year-old woman. T1- weighted (C) and T2-weighted (D) MR images obtained at level of aortic arch (superior portion of main lesion) show cyst as well-demarcated high-signal-intensity lesion and parenchymal change (arrow, C) in surrounding lung, similar to its appearance on CT scans.

 


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  		Fig. 1D. —Intrapulmonary bronchogenic cyst in 37-year-old woman. T1- weighted (C) and T2-weighted (D) MR images obtained at level of aortic arch (superior portion of main lesion) show cyst as well-demarcated high-signal-intensity lesion and parenchymal change (arrow, C) in surrounding lung, similar to its appearance on CT scans.

 


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  		Fig. 1E. —Intrapulmonary bronchogenic cyst in 37-year-old woman. Photomicrograph of histopathologic specimen shows sequential layers of cystic wall (cw), area of bronchiolization (br), area of fibrosis with collagen deposition (fb), and emphysema (e) from central cyst (c) to peripheral pleural layer (p). (H and E, x12)

 


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  		Fig. 2A. —Intrapulmonary bronchogenic cyst in 61-year-old woman. High-resolution CT scan (1-mm collimation, mediastinal window setting) obtained at level of liver dome shows well-defined homogeneous 45-mm lesion in right lower lobe with low attenuation (9 H). Enhanced scan (not shown) revealed no changes in attenuation.

 


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  		Fig. 2B. —Intrapulmonary bronchogenic cyst in 61-year-old woman. High-resolution CT scan (lung window setting) shows mosaic low attenuation in surrounding lung parenchyma (arrowheads) that at histopathologic examination was found to correspond to emphysematous areas.

 

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