case_images: PMC9452647_01
case_images: 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).
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case_images: PMC9452647_01_fonc-12-956236-g001.jpg
case_images: f1
case_images: Subsequently, diffuse pulmonary embolism was detected by CT angiography ( Figure 1 ).
case_images: 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.
case_images: fonc-12-956236-g002.jpg
case_images: PMC9452647_01_fonc-12-956236-g002.jpg
case_images: f2
case_images: 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 ).
case_images: HE, anti-vimentin, SMA, CD-34, CK-3, CK-5, desmin and s-100 immunohistochemistry staining was performed to identify LGMFS.
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case_images: PMC9452647_01_fonc-12-956236-g003.jpg
case_images: f3
case_images: The percentage of Ki-67-positive cells was about 30% ( Figure 3 ).
case_images: Postoperative echocardiography and transverse CT angiogram showed that most tumor tissue of both lungs has been resected with a little residual occlusion.
case_images: fonc-12-956236-g004.jpg
case_images: PMC9452647_01_fonc-12-956236-g004.jpg
case_images: f4
case_images: A subtotal resection was confirmed by postoperative CT angiography and echocardiography ( Figure 4 ).