Objective To furthur recognize the pathomorphological features of the endometrial stromal tumors.MethodsThe clinicopathological analysis was made for 19 cases of endometrial stromal tumors of uterus, including 1 of nodule, 15 of low-grade sarcomas and 3 of high-grade sarcomas. ResultsThe location of neoplasm predominated in submucosal in 4 cases, 4 cases of sarcomas recurred after operation. 4 cases showed extrauterine tumors. Sex-cord-like differentiation presented in 6 tumors. Smooth muscle differentiation was found in 7 cases. ConclusionLow-grade endometrial stromal sarcomas is the commonest histopathological pattern in the endometrial stromal tumors. Sex-cord-like differentiation and smooth muscle differentiation are not rare in endometrial stromal tumors.