ENDOMETRIAL STROMAL SARCOMA OF THE UTERUS WITH RHABDOID FEATURES

A case of endometrial stromal sarcoma of the uterus with rhabdoid feat ures, occurring in a 57 year old woman is reported. Electron microscop y and immunohistochemistry revealed that the rhabdoid cells contained intermediate filaments which were positive for vimentin, cytokeratin, alpha-smooth muscle actin, and muscle specific actin, but not for myog lobin and desmin. This indicated that the tumor in this case differed somewhat from the three rhabdoid tumors and an endometrial stromal sar coma with rhabdoid differentiation previously reported and that, there fore, these tumors were heterogeneous.