1. A 28-Year-Old Woman With Branching Opacity and Chest Pain
Daniel D. Droukas, MD, Stephen C. Machnicki, MD 
CHEST 
Volume 151, Issue 4, Pages e85-e89 (April 2017)
DOI: /j.chest
Copyright © 2017 American College of Chest Physicians Terms and Conditions

2. Figure 1
A and B, Posteroanterior and lateral radiographs of the chest demonstrates a tubular branching opacity overlying the region of the right upper lobe (white arrows) with adjacent paucity of pulmonary vascular markings.
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3. Figure 2
A, Contrast-enhanced axial CT image of the chest with lung windows shows a tubular, nonenhancing lesion (white arrow) surrounded by an area of wedge-shaped hyperlucency (curved white arrows) within the right upper lobe. B, Oblique maximum intensity projection with lung-windows better emphasizes the tubular branching nature of the lesion (white arrow) as well as narrowed vasculature within affected parenchyma. C, Coronal minimum intensity projection with lung windows emphasizes wedge-shaped peripheral hyperlucency secondary to air trapping (white arrows).
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Copyright © 2017 American College of Chest Physicians Terms and Conditions

4. Figure 3
A, Planar ventilation scintigraphy following inhalation of technetium-99m-labeled DTPA (diethylene-triamine-pentaacetate) aerosol shows a wedge-shaped ventilation defect radiating from the right hilum (white arrow). B, Fused single-photon emission CT/CT scanning following the injection of 4 mCi of technetium-99m-labeled macroaggregated albumin shows an associated perfusion defect (white arrow), corroborating CT findings of regional oligemia within the affected lung parenchyma.
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Copyright © 2017 American College of Chest Physicians Terms and Conditions

5. Figure 4
A, Section from the resected mass at low-power magnification shows bronchiolar dilation with areas of mucostasis (arrows). B, Intermediate magnification reveals peribronchial fibrosis (curved arrow) with lymphocytic infiltrate (arrow). C, High-power magnification emphasizes diffusely dilated alveolar air spaces. Two lymph nodes sent separately for review were benign (not shown).
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Copyright © 2017 American College of Chest Physicians Terms and Conditions