1. Volume 140, Issue 3, Pages 808-813 (September 2011)
A 30-Year-Old Woman With Intermittent Cough and a Mass-Like Opacity in the Right Upper Lobe 
Thitiporn Suwatanapongched, MD, Sumalee Kiatboonsri, MD, Yingluck Visessiri, MD, Somboon Boonkasem, MD 
CHEST 
Volume 140, Issue 3, Pages (September 2011)
DOI: /chest
Copyright © 2011 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Posteroanterior chest radiograph showing a homogeneous mass-like opacity in the right upper lobe (*). The smooth, lateral margin of the mediastinal mass (arrow) protrudes to the right side of the mediastinum, just above the right hilar shadow.
CHEST  , DOI: ( /chest )
Copyright © 2011 The American College of Chest Physicians Terms and Conditions

3. Figure 2
A and B, Nonenhanced axial CT images in mediastinal-window setting. C, Nonenhanced axial CT image in lung-window setting. Images show a rather well-defined 4-cm cystic mass (*). The mass has a smooth, thin wall with a few tiny foci of punctate calcifications in its wall (arrows in B) and contains near-water attenuation materials and small discrete foci of fat (thin arrow in A) and soft-tissue attenuation. There is a large area of consolidation in the anterior segment of the right upper lobe containing air-filled dilated bronchi (thick arrow in A). C, The image obtained at the level of the right upper lobe bronchus suggests partial obliteration of the subsegmental bronchi (arrow) of the involved segment. S = superior vena cava.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

4. Figure 3
A and B, Contrast-enhanced axial CT images in mediastinal-window setting. C, Contrast-enhanced coronal CT image in mediastinal-window setting. Images demonstrate heterogeneous contrast enhancement of the consolidated lung in which multiple air-filled and mucus-filled (thin arrows) dilated bronchi and multiple enhanced, tortuous vessels (wavy arrow in B) are seen. A solid component (arrowhead in B) within the anterior mediastinal mass (*) is noted. There is a focal discontinuity (thick arrow in C) at the lateral wall of the anterior mediastinal mass, which is contiguous with the mucus-filled dilated bronchus. Some dilated bronchial arteries (black arrow in B) in the subcarinal region are seen. See Figure 2 legend for expansion of the abbreviation.
CHEST  , DOI: ( /chest )
Copyright © 2011 The American College of Chest Physicians Terms and Conditions

5. Figure 4
A, Follow-up chest radiograph. B, Follow-up coronal CT image in lung window setting. Images reveal residual bronchiectatic changes (arrows) in the anterior segment of the right upper lobe.
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions

6. Figure 5
A, Gross specimen of the cystic mediastinal mass containing sebum, cartilage, and hair. B-D, Histopathologic examination of the mass wall with hematoxylin-eosin stain. B, Squamous epithelium lining along the cyst wall with multiple foci of sebaceous glands, apocrine glands, and hair follicles (original magnification ×20). C, Bronchial-like structures, respiratory epithelium and cartilage (original magnification ×100). D, Pancreatic acini with islet cells (original magnification ×400).
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Copyright © 2011 The American College of Chest Physicians Terms and Conditions