case_images: PMC11060023_01
case_images: Ultrasound shows space occupying in left atrium.
case_images: 10.1177_2050313X241242894-fig1.jpg
case_images: PMC11060023_01_10.1177_2050313X241242894-fig1.jpg
case_images: fig1-2050313X241242894
case_images: Ultrasound examination suggested that there was a mass in her left atrium (Figure 1), and the patient also had pulmonary hypertension, tricuspid regurgitation, pericardial effusion, and pleural effusion.
case_images: Macroscopically, most parts of the tumor are white and solid lobulated, while some parts are dark red.
case_images: 10.1177_2050313X241242894-fig2.jpg
case_images: PMC11060023_01_10.1177_2050313X241242894-fig2.jpg
case_images: fig2-2050313X241242894
case_images: It was 8 cm long, 4.5 cm wide, and 2.8 cm thick (Figure 2).
case_images: Tumor under microscope, H&E staining, whole slide imaging, 20x; (a) The tumor cells were atypical and crowded; (b) In some areas, the tumor cells were surrounded by myxoid stroma.
case_images: 10.1177_2050313X241242894-fig3.jpg
case_images: PMC11060023_01_10.1177_2050313X241242894-fig3.jpg
case_images: fig3-2050313X241242894
case_images: Frequent mitosis and necrosis were also observed (Figure 3(a)). In some areas, the tumor cells were surrounded by myxoid stroma (Figure 3(b)).
case_images: Tumor under microscope, immunohistochemistry staining, whole slide imaging, 20x. (a) tumor cells are positive for vimentin; (b) tumor cells are positive for CDK 4; (c) tumor cells are positive for MDM2; (d) tumor cells are negative for s-100.
case_images: 10.1177_2050313X241242894-fig4.jpg
case_images: PMC11060023_01_10.1177_2050313X241242894-fig4.jpg
case_images: fig4-2050313X241242894
case_images: The tumor cells were immunoreactive for vimentin (Figure 4(a)), CDK4 (Figure 4(b)), MDM2 (Figure 4(c)), CD99, SMA, calretinin, WT-1, and caldesmon, and partially positive for keratin, CD34, desmin, and calponin. However, the cells were negative for S-100 (Figure 4(d)), CD31, EMA, and D2-40, while the Ki-67 proliferation index was 70%.