1. A 49-Year-Old Woman With Right Apical Thoracic Mass
Yevgeniy A. Linnik, MD, Dagmar Hoegemann Savellano, MD, Joseph D. Phillips, MD, Candice C. Black, DO 
CHEST 
Volume 152, Issue 6, Pages e133-e138 (December 2017)
DOI: /j.chest
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2. Figure 1
Chest posteroanterior radiograph shows a large convex density at the medial right apex.
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3. Figure 2
CT scanning showed a well-circumscribed, homogeneous 6-cm mass at the medial apex of the right hemithorax with extension into the upper mediastinum along the trachea, in between the trachea and esophagus, and along the right subclavian vessels.
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4. Figure 3
T1-weighted MRI scan with spectral fat saturation after intravenous contrast enhancement showed diffuse heterogeneous enhancement of the mass. It confirmed its well-circumscribed borders without any evidence of invasion into adjacent structures.
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5. Figure 4
MRI showed a well-circumscribed, slightly heterogeneous mass, which was hypointense on T1-weighted images and hyperintense on T2-weighted images.
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6. Figure 5
The cut surface was white and semitranslucent with a gelatinous appearance, completely surrounded by a thin fibrous capsule.
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7. Figure 6
Monomorphic collagenous stroma between bland spindle cells with areas of myxoid background. Characteristic mature ganglion cells with ample granular cytoplasm and round smooth nuclei are seen in small groups. Hematoxylin-eosin stain.
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8. Figure 7
The stroma was positive for S-100 immunoperoxidase stain, and the singly distributed cells were strongly positive for neurofilament immunoperoxidase stain.
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