PMC9452647_01
Preoperative echocardiography demonstrated a large lobulated mass (arrows) attached by a pedicle to the posterior wall of pulmonary truck. Transverse CT angiogram revealed a diffused occlusion of both pulmonary arteries (arrows).
fonc-12-956236-g001.jpg
PMC9452647_01_fonc-12-956236-g001.jpg
f1
Subsequently, diffuse pulmonary embolism was detected by CT angiography ( Figure 1 ).
It is proved during operation that a huge, lobular mass originated in the pulmonary trunk, diffuse growth into both pulmonary arteries was observed, and the entire pulmonary endothelium was covered by a thin mucinous pellicle.
fonc-12-956236-g002.jpg
PMC9452647_01_fonc-12-956236-g002.jpg
f2
When the pulmonary trunk was incised, it was found that a huge, lobular mass originated in the posterior wall and extended throughout the vasculature of both lungs, and a mucinous pellicle covered the entire pulmonary endothelium ( Figure 2 ).
HE, anti-vimentin, SMA, CD-34, CK-3, CK-5, desmin and s-100 immunohistochemistry staining was performed to identify LGMFS.
fonc-12-956236-g003.jpg
PMC9452647_01_fonc-12-956236-g003.jpg
f3
The percentage of Ki-67-positive cells was about 30% ( Figure 3 ).
Postoperative echocardiography and transverse CT angiogram showed that most tumor tissue of both lungs has been resected with a little residual occlusion.
fonc-12-956236-g004.jpg
PMC9452647_01_fonc-12-956236-g004.jpg
f4
A subtotal resection was confirmed by postoperative CT angiography and echocardiography ( Figure 4 ).