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Bronchiolitis Obliterans with Organizing Pneumonia Versus Chronic Eosinophilic Pneumonia

High-Resolution CT Findings in 81 Patients

Hiroaki Arakawa1, Yasuyuki Kurihara1, Hiroshi Niimi1, Yasuo Nakajima1, Takeshi Johkoh2 and Hironobu Nakamura2

1 Department of Radiology, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-Ku, Kawasaki City, 216-8511 Japan.
2 Department of Radiology, Osaka University School of Medicine, 2-2, Yamada-oka, Suita Osaka, 5650871 Japan.



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  		Fig. 1. —Predominant ground-glass opacity in 43-year-old woman with chronic eosinophilic pneumonia. High-resolution CT scan at right upper lobe shows patchy areas of ground-glass opacity in periphery of right upper lobe and superior segment of right lower lobe.

 


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  		Fig. 2. —Predominantly nodular pattern of bronchiolitis obliterans with organizing pneumonia (confirmed by open lung biopsy) in 57-year-old man. High-resolution CT scan shows ill-defined nodule in periphery of right upper lobe. Air bronchogram is noted in midst of nodule, suggesting that it is an air-space nodule.

 


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  		Fig. 3. —Peribronchial distribution of ground-glass opacity in 44-year-old man with bronchiolitis obliterans with organizing pneumonia. High-resolution CT scan shows multiple patchy areas of ground-glass opacity in right lung. Opacities are noted along bronchi and are seen in both peripheral and central zones.

 


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  		Fig. 4. —Bronchial dilatation in 68-year-old man with bronchiolitis obliterans with organizing pneumonia. High-resolution CT scan shows consolidation along bronchovascular bundle. Loss of normal tapering of bronchi is noted, suggesting traction bronchiectasis. Note nonseptal linear opacities in ventral portion of right middle lobe (arrows).

 


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  		Fig. 5. —High-resolution CT scan of left lung apex in 42-year-old woman with chronic eosinophilic pneumonia. Smooth thickening of interlobular septa (arrows) and peripheral ground-glass opacity are apparent.

 


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  		Fig. 6. —Intralobular reticular opacity in 68-year-old man with bronchiolitis obliterans with organizing pneumonia. High-resolution CT scan at left lung base shows fine reticular opacity associated with ground-glass opacity and dilatation of bronchi.

 

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