子宫内膜间质肿瘤是来自子宫内膜的间质细胞,可伴不同成分分化,其良、恶诊断主要依据是否对周围组织有浸润而分为3型：①子宫内膜结节(endometrial stromal module)；②低度恶性的子宫内膜间质肉瘤(low grade malignant endometrial stromal sarcoma,LESS)；③高度恶性的子宫内膜间质肉瘤(high grade malignant endometrial stromal- sarcoma,HESS)。据其分型及伴随的分化有利诊断、鉴别诊断、选用治疗方案、估计预后。随着研究的深入,人们对子宫内膜间质肿瘤的认识已 Endometrial stromal tumors are stromal cells from the endometrium, which may be associated with different components of differentiation, the diagnosis of benign and malignant mainly based on whether there is infiltration of the surrounding tissue into 3 types: ① endometrial nodules (endometrial stromal module); ② low grade malignant endometrial stromal sarcoma (LESS); ③ high grade malignant endometrial stromal-sarcoma (HESS). According to its classification and the accompanying differentiation favorable diagnosis, differential diagnosis, selection of treatment options, estimation of prognosis. With the deepening of research, people have already got the understanding of endometrial stromal tumors