Histopathology of Endometrial Stromal Sarcoma with Emphasis on Immunohistochemistry Marker Expression: Report of Three Cases
Endometrial stromal tumors are rare uterine mesenchymal neoplasms.Endometrial stromal sarcomas (ESSs) are of endometrial stromal origin that accounts for approximately 1% of all uterine malignant neoplasms.ESS is classified into endometrial stromal nodule (ESN), low-grade ESS (LG-ESS), high-grade endometrial stromal sarcoma (HG-ESS), and undifferen