case_images: PMC9639434_01
case_images: (A) Frontal chest radiograph showing right homogeneous opacification in the middle and 
  lower zones including the left middle zone. . (B) Lateral view indicating anterior mediastinal mass 
  (arrow).
case_images: AJTCCM-28-3-181-fig1.jpg
case_images: PMC9639434_01_AJTCCM-28-3-181-fig1.jpg
case_images: F1
case_images: The  frontal chest radiograph showed a dense  homogeneous opacification in the right  middle and lower zones, and the left middle  zone (Fig. 1).
case_images: (A) Axial cut mediastinal window computed tomography scan of the chest showing the soft-tissue dense mass on the right, herniating to the left hemithorax (black arrow). The blue arrow shows 
  the compressed right bronchus.
  . (B) Coronal view showing the compressed right lung (red arrow).
case_images: AJTCCM-28-3-181-fig2.jpg
case_images: PMC9639434_01_AJTCCM-28-3-181-fig2.jpg
case_images: F2
case_images: A chest  computed tomography (CT) scan (Fig. 2)  showed an anterior soft-tissue hypodense  mass on the right with herniation across the  midline to the left hemithorax that displaced  surrounding structures but was not encasing  them.
case_images: Anterior sternotomy revealed the well-capsulated mass, which was resected in totality.
case_images: AJTCCM-28-3-181-fig3.jpg
case_images: PMC9639434_01_AJTCCM-28-3-181-fig3.jpg
case_images: F3
case_images: The tumour was initially  removed as a well-encapsulated bilobar mass,  but the mass extended posteriorly into the right  thorax and required some piecemeal resection  (Fig. 3).