PMC5804610_01
a CT scan showing the mediastinal mass severely compressing the trachea (solid line circle). b Enhanced CT scan showing a large anterior-superior mediastinal mass [113 x 87 x 68 mm (length, height, width; dotted line circle)] compressing the superior vena cava (yellow arrow)
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PMC5804610_01_40981_2017_98_Fig1_HTML.jpg
Fig1
The mass severely compressed the trachea [minimum diameter, 3.5 mm], bilateral main bronchus, and the superior vena cava (SVC) (Fig. 1a, b). 
CT scan following chemotherapy showing significant regression of the mass and decreased compression of the trachea
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PMC5804610_01_40981_2017_98_Fig2_HTML.jpg
Fig2
The lymphoma regressed significantly, and compression of the trachea, bronchus, and SVC diminished after 1 month of chemotherapy (Fig. 2). 