Figure Legends
Figure 1
Transesophageal echocardiogram of the heart tumor. A mass was observed in the right atrium. A papillary structure was also discovered (yellow arrowhead). T, tumor; RA, right atrium; RV, right ventricle.
Figure 2
Macroscopic examination of the autopsy. (A) The heart adhered to the pericardium. The right atrial tumor was connected to the pericardium (yellow asterisk). RA, right atrium; RL, right lung; P, pericardium. (B) A dark-red colored tumor was observed in the right atrium. The specimen was cut along the yellow line. (C) Cut surface of the heart tumor. (D) Cut surface of the right lung. The tumor invaded the pleura and the lung parenchyma. The visceral pleura was penetrated by the tumor cells in the yellow arrowhead portion. Multiple metastases were also identified. Portions indicated by yellow asterisks of Figure 2C and 2D are connected to each other, and the portions correspond to the yellow asterisks in Figure 2A. Bars, 1 cm
Figure 3
Histological and immunohistochemical findings of the autopsy specimen. (A) and (B) H&E staining of the heart tumor. (A) Atypical tumor cells with vascular formation were observed. Bar, 50 μm (B) The tumor cells with a papillary structure protruded into the atrial cavity. Bar, 1 mm (C) CD31 immunostaining revealed vascular differentiation of the tumor cells. Bar, 100 μm