Fig. 2.

The macroscopic and microscopic findings and immunohistochemical staining of the intracardiac tumor: a and b Macroscopically, the tumor was a 78 × 58 × 55-mm mass, with a pedicle (red arrows) clinging to the right atrium. b The cut surface showed a gray-white colored solid mass. c and d Microscopically, the rich microvasculature of the pedicle was shown (red arrows); d The tumor consisted of spindle-shaped cells, with eosinophilic cytoplasm, lacked atypia, and was accompanied by a myxoid change (high power view). e and f Immunohistochemically, the tumor cells were positive for (e) desmin and (f) ER