OBJECTIVE: To study the clinicopathological characteristics and immunohistochemistry phenotype of endometrial stromal sarcoma (ESS), and their clinical significance for the differential diagnosis between ESS and highly cellular leiomyoma (HCL).

• 目的:探讨子宫内膜间质肉瘤(endometrial stromal sarcoma,ESS)的临床病理及免疫组织化学特点及其在鉴别诊断中的意义。